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Agenda

  • Day 1Sunday, February 25th
  • Day 2Monday, February 26th
  • Day 3Tuesday, February 27th
11:40 am

Visitors lunch

Campus Diner

Campus Diner 11:40 - 12:40 Details

12:40 pm

Short introduction

Prof. Stefaan De Wolf, Associate Professor of Material Science & Engineering, KAUST Solar Center (KSC)
Prof. Derya Baran, Assistant Professor of Material Science & Engineering, KAUST Solar Center (KSC)

Auditorium between Building 4 and 5 12:40 - 12:45 Details

Workshop
12:45 pm

Charge Recombination and the Open-Circuit Voltage of Solar Cells

Most photovoltaic technologies exhibit high photon-to-charge-carrier conversion yields, approaching 90%-100%. However, a solar cell only generates power when an additional photo-voltage is produced. This photo-voltage is ideally as close as possible to the open-circuit voltage (Voc) of the device. When a solar cell is held at open-circuit, no charges flow in the external circuit, hence they all recombine within the photovoltaic material. Suppressing the recombination of charge carriers will result in increased Voc and power conversion efficiencies. Recombination can result in the emission of a photon or can occur non-radiatively, with the former being unavoidable and thus limiting Voc. In this lecture, we will consider general relations between photon absorption, emission and photovoltaic action, valid for established and emerging photovoltaic technologies. We will derive upper limits for Voc and summarize strategies to suppress recombination and reach those limits. Organic photovoltaics, where charge-transfer states between electron donating and accepting materials play a crucial role, will be discussed in more detail.

  • Dr. Koen Vandewal, Insitute for Materials Research, Hasselt University

    Dr. Koen Vandewal

Auditorium between Building 4 and 5 12:45 - 13:45 Details

Dr. Koen Vandewal, Insitute for Materials Research, Hasselt University
1:45 pm

Coffee break

Auditorium between Building 4 and 5 13:45 - 14:15 Details

2:15 pm

Research ethics: case studies and discussion

Dr. Damien Lightfoot will talk about several cases of research ethics violations, including the Schön scandal in the Bell Labs between 2000 and 2002 as well as the South Korean stem cell controversy of 2004 to 2006. He will discuss the “slippery slope” from questionable research practices to fraud and the potential implications that range from manuscript retraction to civil and criminal court proceedings. Damien will also explore the responsibility of co-authors and colleagues in these cases.

  • Dr. Damien Lightfoot, King Abdullah University of Science and Technology (KAUST)

    Dr. Damien Lightfoot

Auditorium between Building 4 and 5 14:15 - 15:00 Details

Dr. Damien Lightfoot, King Abdullah University of Science and Technology (KAUST)
3:00 pm

Coffee break

Auditorium between Building 4 and 5 15:00 - 15:30 Details

3:30 pm

Device Physics of Perovskite Solar Cells – Hysteresis and Recombination

Solar cells based on lead halide perovskites have recently emerged showing a tremendous increase of power-conversion efficiency which exceeded 22%. In this tutorial talk, the device physics of perovskite solar cells is addressed. The focus is on recombination of charge carriers because this process is ultimately limiting the performance.

The origin of the open-circuit voltage is discussed based on the reciprocity relation between electroluminescence and photovoltaic quantum efficiency.1,2 Sharp absorption onset and high radiative recombination yield due to an extraordinary defect tolerance are identified as reasons for the outstanding optoelectronic properties of perovskites. Furthermore, the role of defect and surface recombination are addressed.

Surprisingly, a current-voltage measurement of perovskite solar cells yields different results dependent on the initial voltage of the sweep. The resulting hysteresis in the current-voltage curve is related to recombination as well.3 These results are explained based on the mixed ionic and electronic conductivity of the material, where displaced ions change interface and defect recombination. Reversible photo-induced and irreversible heat-triggered degradation mechanisms on the timescale of minutes to hours are covered as well.

An outlook is given on strategies aiming for a further improvement of open-circuit voltage and performance of perovskite solar cells toward their thermodynamic limit.

  • Dr. Wolfgang Tress, École Polytechnique Fédérale de Lausanne

    Dr. Wolfgang Tress

Auditorium between Building 4 and 5 15:30 - 16:30 Details

Dr. Wolfgang Tress, École Polytechnique Fédérale de Lausanne
4:30 pm

Advanced modelling of E/UIPV systems from location to load

We report on an advanced modelling approach to accurately predict the energy yield of custom environment / urban integrated photovoltaic systems (E/UIPV). Several sub-models are here presented and their mutual interaction discussed. The flexibility of our software platform allows to exhaustively simulate custom horizons in combination with rigid/flexible PV modules and in presence of albedo component. In this respect, a modelling example predicts AC-side yield with < 1% error on annual basis with respect to actual data. In addition, our platform can also deal with coloured / bifacial modules and soiling losses for PV energy yield potential or performance prediction.

  • Dr. ir. Olindo Isabella, Delft University of Technology

    Dr. ir. Olindo Isabella

Auditorium between Building 4 and 5 16:30 - 17:30 Details

Dr. ir. Olindo Isabella, Delft University of Technology
7:00 pm

Welcome dinner

In the area opposite of the Grand Mosque (near the wooden bridge).

KAUST 19:00 - 20:30 Details

8:00 am

Registration and breakfast

Auditorium between Building 4 and 5

Auditorium between Building 4 and 5 08:00 - 08:30 Details

8:30 am

Welcome address

Prof. Yves Gnanou, Dean of PSE Division & Distinguished Professor of Chemistry
Prof. Iain McCulloch, Director of KAUST Solar Center (KSC)
Prof. Stefaan De Wolf, Associate Professor of Material Science & Engineering, KAUST Solar Center (KSC)

Auditorium between Building 4 and 5 08:30 - 09:00 Details

Conference
9:00 am

Augmenting Silicon Using Colloidal Quantum Dots and Perovskites

Silicon dominates the PV market. Its performance stands to be augmented further using hybrid tandem approaches. We discuss advances in large-bandgap perovskite front cells; and small-bandgap back cells based on colloidal quantum dot solids; that separately or together stand to add power points to silicon cells.

  • Dr. ​Edward Sargent, University of Toronto

    Dr. ​Edward Sargent

Auditorium between Building 4 and 5 09:00 - 09:30 Details

Dr. ​Edward Sargent, University of Toronto
9:30 am

Understanding Defect Physics in Metal-Halide Perovskites for Optimizing Optoelectronic Devices

Semiconducting metal-halide perovskites present various types of chemical interactions which give them a characteristic fluctuating structure sensitive to the operating conditions of the device, to which they adjust. This makes the control of structure-properties relationship, especially at interfaces where the device realizes its function, the crucial step in order to control devices operation. In particular, given their simple processability at relatively low temperature, one can expect an intrinsic level of structural/chemical disorder of the semiconductor which results in the formation of defects.

Here, Dr. Annamaria Petrozza will review her understanding in the identification of key parameters which must be taken into consideration in order to evaluate the suscettibility of the perovkite crystals (2D and 3D) to the formation of defects, allowing one to proceed through a predictive synthetic procedure. I will discuss the role of defect physics in determing the open circuit voltage of metal halide perovskite solar cells and present technological strategies for the optimization of devices which include: 1) the engineering of the charge extracting layer (CEL), which accounts not only for the energy level alignment between the CELs and the perovskite, but also for the quality of the microstructure of the perovskite bulk film that is driven by the substrate surface; and 2) the use of inks based on colloidal suspensions of nanoparticles which lead to a high level of control over the material quality and device reliability, and offer more versatile processing routes by decoupling crystal growth from film formation.

  • Dr. Annamaria Petrozza, Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia

    Dr. Annamaria Petrozza

Auditorium between Building 4 and 5 09:30 - 10:00 Details

Dr. Annamaria Petrozza, Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia
10:00 am

High efficiency photovoltaic module HIT(TM) with novel silicon heterojunction technology

The silicon heterojunction [SHJ] structure adopted in Panasonic’s photovoltaic module HIT® is recognized as one of the highest efficiency solar cells that has following advantages over a conventional c-Si solar cell, (1) a high efficiency over 22% with high open circuit voltage [Voc] of more than 720 mV, (2) higher power generation in practical use due to the world's leading output temperature coefficient of -0.258%/°C, (3) a symmetrical cell structure essentially suitable for bifacial module.
This unique structure features a very thin, non-doped amorphous silicon [a-Si:H(i)] layer inserted between p or n-type doped a-Si layer and n-type c-Si substrate. With the insertion of a-Si:H(i) layer at the a-Si/c-Si heterojunction, surface recombination is drastically suppressed. We started our R&D activity on SHJ from 1990, and achieved a conversion efficiency of 20% with a small (1 cm2) cell in 1994. The deposition of the high quality a-Si:H film is the key technology that has been cultivated through our long time experience on amorphous silicon solar cells started from 1975.
Since then, we have continued to improve the conversion efficiencies of the SHJ solar cell with a practical size (> 100 cm2) and have broken the world record for several times. Especially, we have proved that the well surface-passivated solar cell can maintain the high efficiency with reducing the thickness of Si substrate down to less than 100 µm. We obtained the efficiency of 24.7% with 98-µm-thick Si in 2013. Where, the surface recombination velocity at the a-Si/c-Si heterointerface was estimated as low as 1.4 cm/s and the excellent Voc of 750 mV was achieved. In addition, an interdigitated back contact structure was adopted with our SHJ cells to eliminate the shadow loss of front grid electrode and absorption losses of TCO and a-Si on front surface in our standard structure SHJ cell. With this structure, we obtained a new world record efficiency of 25.6% in 2014 (designated area, 143.7 cm2, confirmed by AIST). This broke the previous world record of 25.0% (4 cm2) after interval of 15 years and gathered much attention. We always led the high efficiency Si solar cell technology in this way.
Panasonic built its first production line of the HIT® in 1997, and has produced billions of cells with accumulating the experience of mass production for 20 years. The module technologies suitable for SHJ cells to obtain high efficiency and high reliability have been developed. We have adopted non-soldered, grooved tabbing wire for cell interconnection to utilize the light that strikes the tabbing wire from 2010. Further, we introduced the bifacial module to the market in 2000 and did pioneered work from the early stage of our business. In 2012, Panasonic was commended "for developing and commercializing high-performance heterojunction solar technology (HIT®)" by the IEEE.
Furthermore, to expand the use of the HIT®, we have developed technologies to laminate three-dimensional curved glass to match the automotive body design, achieving the installation of modules on the roof of the new Prius PHV released by Toyota Motor Corporation. Electrical energy generated from solar cells can be applied to the charging of driving power sources, thereby extending an EV's travel distance per charge.
Now, Tesla and Panasonic are preparing to start manufacturing solar cells and modules at the Buffalo, New York factory.
We will continue to pursue technology development of our SHJ solar cells, aimed at realizing higher efficiency, lower costs and the more efficient use of resources, and will work towards mass production of the industry’s top level efficiency and energy saving solar panels on the market.

  • Dr. Mikio Taguchi, Panasonic Corporation

    Dr. Mikio Taguchi

Auditorium between Building 4 and 5 10:00 - 10:30 Details

Dr. Mikio Taguchi, Panasonic Corporation
10:30 am

Coffee break

Auditorium between Building 4 and 5 10:30 - 10:50 Details

10:50 am

Terawatt-Scale Photovoltaics: Trajectories and Challenges

It is well understood and commonly cited that the solar energy resource significantly exceeds the world’s total energy consumption. However, despite dramatic advances in deployment and cost reduction, the vision of photovoltaics (PV) providing a significant fraction of global electricity generation—and ultimately, total energy demand— remains to be realized. In the near term, PV has a clear path for substantial growth. Longer term, the question remains whether PV will be able to provide a moderate (e.g., 20%, ~ 4 TW in 2030) or a large (e.g., 50%, ~ 10 TW in 2030) fraction of world electricity needs.

Terawatt scale PV deployment is achievable with growth rates substantially below what the industry has achieved over the past decade. Material for this presentation will be drawn from The Terawatt Workshop and a resulting April 2017 publication in Science. Led by the Global Alliance for Solar Energy Research Institutes (GA-SERI), leaders in PV came together to highlight the opportunity and discuss the challenges that need to be addressed to realize the vision of TW scale PV. These challenges include the continuing demand for improved efficiency and reliability, the required magnitude of capital expenditure, the need for a sustainable industry (both financially and environmentally), as well as needs for grid modernization and consistent policies to meet energy demand, enable greenhouse gas reduction and advance global prosperity based on a secure and sustainable energy system. Finally, the presentation will briefly highlight some research directions in PV at NREL that address performance limiting factors and offer pathways to increased efficiency, increased reliability and reduced manufacturing costs.

  • Dr. Nancy M. Haegel, National Renewable Energy Laboratory

    Dr. Nancy M. Haegel

Auditorium between Building 4 and 5 10:50 - 11:20 Details

Dr. Nancy M. Haegel, National Renewable Energy Laboratory
11:20 am

Stretching the efficiency limit of mass-producible solar cell and solar fuel devices by multi-junction based absorber structures

With the advent of the exciting new material class of inorganic/organic perovskite absorbers, a realistic option has emerged for multi-junction solar cells combining high efficiency with industrial manufacturability. In order to enable future solar-cell efficiencies to exceed the theoretical efficiency limit for single junction devices, we have realigned our research activities over the past years to focus on these absorber material class with a view to applications in multi-junction devices. In collaboration with international partners we have demonstrated the feasibility and pushed the performance of such structures.

In this talk we will highlight recent progress in absorber and contact materials as well as adapted processing methods and device design for two-terminal silicon-perovskite tandems. We will also highlight our recent developments in multi-junction devices for solar fuel generation, based on wide-bandgap oxide absorbers.

  • Dr. Rutger Schlatmann, Helmholtz-Zentrum Berlin

    Dr. Rutger Schlatmann

Auditorium between Building 4 and 5 11:20 - 11:50 Details

Dr. Rutger Schlatmann, Helmholtz-Zentrum Berlin
11:50 am

Efficient Solar-Driven CO2 Reduction Producing Hydrocarbons and Oxygenates

Solar-driven conversion processes yielding fuels and commodity chemicals could provide an alternative to mankind’s currently unsustainable use of fossil fuels [1]. Photoelectrochemical (PEC)
Achieving a viable solar-driven EC CO2 reduction energy conversion efficiency requires minimizing potential losses in all aspects of the device including the cathode, anode, electrolyte, and membrane. Achieving selective products requires management of multi-electron transfer reactions [4]. Strategies to optimize each component of a CO2 electrolyzer cell to obtain high selectivity and energy conversion efficiency at low overpotential will be described. An overall cell design which has efficient gas to liquid mass transfer of CO2 is employed [5]. Use of a CsHCO3 buffered electrolyte increases selectivity to C2+ products such as ethylene and ethanol [6,7]. A nanostructured IrOx anode has been synthesized, which shows superior stability and high performance for oxygen evolution in the pH range of interest for CO2 reduction. Use of a bimetallic CuAg nanocoral type cathode enables selectivity to hydrocarbons and oxygenates over a wide range of pH and cell voltage conditions.

Solar-driven CO2 reduction is accomplished by coupling the optimized electrolyzer to cell to Si solar cells. 1 sun efficiencies of over 4% for the production of hydrocarbons and oxygenates (e.g. ethylene, ethanol, propanol) are achieved. Notably, the overall system also functions at >3% conversion efficiency at illumination intensities down to 0.3 suns. Use of a 4-terminal III-V/Si tandem cell leads to a conversion efficiency to hydrocarbons and oxygenates of over 5% [8].

Finally, methods to achieve product separation [9] will be discussed in the context of an overall life cycle assessment of the system.

  • Dr. Joel W. Ager, University of California, Berkeley

    Dr. Joel W. Ager

Auditorium between Building 4 and 5 11:50 - 12:20 Details

Dr. Joel W. Ager, University of California, Berkeley
12:20 pm

KAUST Approach to Innovation

  • Dr. Kevin Cullen, King Abdullah University of Science and Technology (KAUST)

    Dr. Kevin Cullen

Auditorium between Building 4 and 5 12:20 - 12:45 Details

Dr. Kevin Cullen, King Abdullah University of Science and Technology (KAUST)
12:45 pm

Lunch break

Campus Diner

Campus Diner 12:45 - 14:00 Details

2:00 pm

Advanced hole & electron transport interlayers for solar cell applications

There is currently an immense demand for novel p- and n-type semiconductors that can function as hole & electron transport layers (HTL, ETL respectively) in the emerging field of 3rd generation solar cells. This is primarily due to the significant improvements in device performance demonstrated when suitable HTL/ETL are incorporated between the metallic electrodes of the device and the photoactive material. An ideal interlayer should combine several desirable characteristics that include; low cost, chemical stability, optical transparency, appropriate energy level alignment with the active material, and compatibility with low-temperature and large-area processing methods. Due to the numerous requirements, the choice of readily available HTL & ETL materials still remain limited. In this talk I will discuss the development of alternative HTL/ETL technologies that combine several attractive characteristics including, processing versatility and extreme optical transparency with strictly selective charge carrier transport. I will show how the use of such unconventional materials enable the facile manufacturing of high performance optoelectronics including solar cells and organic light-emitting diodes, while at the same time pave the way to novel device concepts.

  • Dr. Thomas Anthopoulos , King Abdullah University of Science and Technology (KAUST)

    Dr. Thomas Anthopoulos

Auditorium between Building 4 and 5 14:00 - 14:30 Details

Dr. Thomas Anthopoulos , King Abdullah University of Science and Technology (KAUST)
2:30 pm

New Generation of Broadband-Transparent Highly-Conductive Transparent Electrodes for High Efficiency Photovoltaics

New high efficiency photovoltaic technologies, such as silicon heterojunction (SHJ) solar cells and perovskite-on-silicon tandem solar cells, have set critical requirements for the design of their transparent electrodes, mainly new transparent conductive oxides (TCOs) simultaneously featuring high lateral conductivity and exceptionally low optical absorption over a broad spectral region (UV-IR). In addition to this, electrically and chemically well-‘matched’ interfaces with the carrier-selective and metal contacts of the solar cells are as well required to enhance device efficiency. Degenerate high mobility TCOs are ideal to achieve high conductivity and broadband transparency, as well as to reduce the contact resistance in the device. In this talk we compare the latest developments in high-mobility TCOs, mainly hydrogenated indium-based TCOs (e.g. IO:H), Zr-doped indium oxide (IZrO) and indium zinc oxide (IZO) as alternatives to the widely used Sn-doped indium oxide (ITO). IO:H and IZrO present exceptionally high electron mobilities (> 100 cm2/Vs) achieved at low deposition temperatures (< 200 °C), wide band gap (between 3.5 and 3.8 eV) and low sub-bandgap absorption. We discuss how these properties are strongly liked to a low density of defects and high crystalline quality independent of the growth substrate. The fundamental properties of these high-mobility TCOs, to their integration into high-efficiency SHJ cells as their front electrode and into semitransparent perovskites for tandem cells, will be furthermore discussed. Finally, we present recent efforts to replace or reduce indium in TCOs, discuss future challenges in the field of transparent electrodes for photovoltaics combining carrier selectivity, transparency and conductivity, and propose guidelines to design new TCOs with decoupled optical and electrical properties.

  • Dr. Monica Morales-Masis, Ecole Polytechnique Fédérale de Lausanne (EPFL)

    Dr. Monica Morales-Masis

Auditorium between Building 4 and 5 14:30 - 15:00 Details

Dr. Monica Morales-Masis, Ecole Polytechnique Fédérale de Lausanne (EPFL)
3:00 pm

Perovskite-Silicon Tandem Solar Cells: Progress, Challenges and Opportunities

With commercial silicon solar cells approaching both practical and theoretical efficiency limits, there is growing research effort to develop new low-cost technologies capable of reaching efficiencies of 30% and beyond. Silicon-based tandems that combine current industrial technology with emerging thin-film PV materials are considered the most cost-effective option for achieving this, with the latest edition of the International Technology Roadmap for Photovoltaics (ITRPV) predicting Si-based tandems to appear in mass production after 2019. The rapid rise of perovskite solar cell performance in the past few years has made perovskites the material of choice as a top cell for such tandems due to their high efficiency and simple, low-cost fabrication. This presentation will identify the challenges and prospects for perovskite-silicon tandems to surpass the efficiency limits of single-junction silicon cells, and will discuss the research developments that led to our recent demonstration of a 26.4% perovskite-silicon tandem. It will also identify the pathway to further efficiency gains, as well as the key challenges to commercialisation.

  • Dr. Tom White, Australian National University

    Dr. Tom White

Auditorium between Building 4 and 5 15:00 - 15:30 Details

Dr. Tom White, Australian National University
3:30 pm

Coffee break

Auditorium between Building 4 and 5 15:30 - 15:50 Details

3:50 pm

Perovskite – a Wonder for Photovoltaic & Optoelectronic Applications

A vacuum deposition process has been developed to fabricate high efficiency perovskite solar cells with high stability using alternating layer-by-layer vacuum deposition. The new deposition process allows us to relax the strict deposition monitoring and control measures, while realizing superior uniformity in film morphology, surface coverage and smoothness, together with crystalline phase purity. The power conversion efficiencies for the planar device is as high as 21.5% on rigid glass substrate, the highest reported so far. More importantly, we have developed a superior low temperature TiO2 coating and transferred the cell fabrication process onto lightweight flexible polymeric substrate. The highest cell efficiency achieved is over 18.3%, it is also the highest efficiency among the flexible perovskite cells reported. Meanwhile, the devices show very good stability over long term exposure in ambient with very low degradation. After a representative cell was exposed in ambient lab condition for 1500 hours, its final cell efficiency is as high as over 91% of its initial efficiency with its degradation accounts for only smaller than 9%. Further analysis on the stability of the perovskite solar cells will be discussed.

  • Dr. Shengzhong (Frank) Liu, Dalian Institute of Chemical Physics and Shaanxi Normal University

    Dr. Shengzhong (Frank) Liu

Auditorium between Building 4 and 5 15:50 - 16:20 Details

Dr. Shengzhong (Frank) Liu, Dalian Institute of Chemical Physics and Shaanxi Normal University
4:20 pm

Physics of contacts to organic solar cells

The rapid rise in performance of organic solar cells over the last decade derived in large part from advances in materials chemistry and processing morphology control of the donor–acceptor photoactive active layers. As a consequence, much of the work in device physics of organic solar cells has focused on the fundamental limits imposed by the photoactive layer, assuming that contacts are non-limiting through the use of MoOx and ZnO2 as hole- and electron-collection layers, with sufficiently high and low work functions, respectively. However, even so, contacts still do limit the performance of organic solar cells.

In this talk, I will explain recent work that shows how device energy-level alignment leads to inevitable losses that limit open-circuit voltage, fill factor, short-circuit current density and thus power conversion efficiency, and how contact behavior transits from the under-optimized regime to optimal to the over-optimized regime as the effective workfunction is swept across the Fermi-level pinning threshold, revealing an unexpected barrier to carrier extraction. As a consequence, there is still a lot of room to improve solar cell performance significantly by contacts engineering, especially in the development of technologically viable contacts, such as those formed by solution processing. I will demonstrate what can now be achieved in this space based on the self-compensated doped polymer charge-collection layers with ultrahigh and ultralow work functions.

  • Dr. Peter Ho, National University of Singapore

    Dr. Peter Ho

Auditorium between Building 4 and 5 16:20 - 16:50 Details

Dr. Peter Ho, National University of Singapore
4:50 pm

Challenge of PV Standardization for Exploring New Applications and Markets

Renewable energy share of global electricity production in 2016 was 24.5% and PV share was 1.5 % (1.2% in 2015). The global capacity of PV has increased at a growth rate around 30% in the last decade and reached 303 GW at the end of 2016 (probably approaching 400 GW at the end of 2017). The cost of PV electricity has continuously come down to 2~3 US cents/kWh in MENA regions thanks to high solar irradiance.

In the developed countries, high penetration of renewables into the grid requires new technologies to avoid grid instability by means of curtailment, energy storage, demand response and so on. Another issue is an integration of various renewable energy sources into the grid. In order to overcome these issues, new standards are needed.

Self-consumption including storage is a possible option to overcome the conflict between renewable energy sources and the utility grid. Building integrated (BI) PV system is attracting attentions as a new market in urban area. Although building attached systems including rooftop systems have long history, building integrated systems including rooftop and façade systems are new industries and the market is still small. Since BIPV systems are interdisciplinary area between electronic technology and construction technology, a gap between two different areas has been an obstacle for exploring the new market. IEC has recently launched a new project upon international standardization of BIPV to remove the obstacle.

PV is simply suitable in sunny areas. A huge potential of PV is expected in MENA regions. The Kingdom of Saudi Arabia (KSA) stated a target of 9.5 GW in the policy paper “Vision 2030”. Although PV market in the KSA will be opened soon, we need to consider technical requirements, i.e. technical standards specific to the KSA environment. Desert climates in the KSA could cause higher energy generation as well as higher stress to PV systems including PV modules and inverters due to high irradiance, higher UV intensity, higher temperature, wider thermal cycle, high humidity in coastal areas, sand deposition, sand abrasion and so on. International standards for PV components are designed for moderate climates and sometimes more stringent requirements are needed. PV standards adapted to the KSA environments should be considered for sustainable growth of the PV market and industry in the KSA.

In this presentation, outlook of potential PV market and its relevant challenge of standardization of renewable technology are discussed. Several example of recent activities upon international standards adapting various application and various environments are introduced.

  • Dr. Michio Kondo, Fukushima Renewable Energy Institute, AIST

    Dr. Michio Kondo

Auditorium between Building 4 and 5 16:50 - 17:20 Details

Dr. Michio Kondo, Fukushima Renewable Energy Institute, AIST
7:00 pm

Poster session

Seaside atrium of University Library
Sponsored by the Royal Society of Chemistry's Energy & Environmental Science and Sustainable Energy & Fuels

University Library 19:00 - 21:00 Details

8:00 am

Registration and breakfast

Auditorium between Building 4 and 5

Auditorium between Building 4 and 5 08:00 - 08:30 Details

Young Speaker Session
8:30 am

Young Speaker Session

8:30 AM: Hairen Tan (University of Toronto), "Contact passivation for efficient and stable low-temperature-processed planar perovskite solar cells"

8:45 AM: Ghada Ahmed (KAUST), "Pyridine-Induced Dimensionality Change in Hybrid Perovskite Nanocrystals"

9:00 AM: Roberto Sorrentino (Istituto Italiano di Tecnologia), "Environmentally friendly solvent inks for perovskite based optoelectronic devices"

9:15 AM: Akmaral Seitkhan (KAUST), "Efficient fullerene solar cells processed from solution"

9:30 AM: Hao Yu Phua (National University of Singapore), "Crosslinked polymer donor network solar cells with non-fullerene acceptors"


The young speaker awards are kindly sponsored by KAUST Industry Collaboration Program (KICP), Industry Partnerships Office and Nature Energy

Auditorium between Building 4 and 5 08:30 - 09:45 Details

9:45 am

Coffee break

Auditorium between Building 4 and 5 09:45 - 10:05 Details

Conference
10:05 am

Technological and economic conditions for mass production beyond the roadmap of mainstream silicon PV

Crystalline silicon solar cells have been the mainstream in global production due to an international community of researchers, dedicated development efforts of standardized production, and huge factories in China and South-East Asia. More than 100 Gigawatts are produced per year (which is equivalent to the power capacity of 100 typical nuclear power stations), and standardization of design, process and materials across the entire supply chain has lowered the fabrication cost greatly: roughly speaking, a standard Si wafer costs less than 70 cents of US$, fabricating a solar cell near 35 cents, module assembly a further 70 cents per cell. For all these reasons, it is hard for alternative cell concepts or materials to enter the mainstream. To gain a big market share, the alternatives must be stable over many years, must not consume scarce materials or lots of energy, and must be cheap and cheaper.

Yet, the mainstream mono-crystalline PERC silicon technology will probably reach its practical efficiency limits near 24% cell efficiency in about 8 years (assuming no major disruptions or breakthroughs), with projected fabrication cost down to half. The presenter believes that this will be a great opportunity for other materials and technologies to come into mainstream via hetero emitters, passivated contacts, and so on. Entering the market with an alternative material or technology is only possible starting from a small scale, hence combining these other materials with silicon wafers may then be helpful to enter mainstream, which may eventually lead to tandem cells or cells without silicon.

However, a new cell concept with 30% efficiency must cost only about 50% more than silicon mainstream costs with 20% efficiency. This economical pressure will sort out many alternative cell concepts, alternative materials, and alternative fabrication processes. The presenter therefore calls for a 10-year strategy that is very carefully chosen, so this great opportunity for other materials and technologies to come into mainstream can be realized.

  • Dr. Pietro Altermatt, Trina Solar

    Dr. Pietro Altermatt

Auditorium between Building 4 and 5 10:05 - 10:35 Details

Dr. Pietro Altermatt, Trina Solar
10:35 am

Van der Waals Junctions Using Low Dimensional Materials: Opportunities and Challenges

Low dimensional materials such as 1D and 2D materials have been under extensive investigations for optoelectronic and energy generation applications. Scientist and engineers have focused much of their attention on the noble prize-winning material, Graphene, an atomically thin layer of graphite. Due to lack of its bandgap, semiconductor applications that require electron-hole separation can be an issue for graphene devices. However, carbon nanotubes (CNTs), which are the 1-dimensional form of graphene, are promising materials for device applications, due to their low dimensionality along with superior mechanical, electrical, and optical properties. One of the major issues in carbon nanotube research has been chirality (metallic or semiconducting) controlled synthesis. Nevertheless, recent carbon nanotube separation techniques have led to synthesizing ultra-pure semiconducting nanotube solution, which offers many advantages for nanoscale device applications. In this talk I will review recent work performed on CNTs/Silicon junctions for optoelectronic applications. I will show that using low purity (mixture of metallic and semiconducting) carbon nanotubes, it is possible to obtain solar cell efficiency as high as 15%. I will also discuss recent results obtained using 99.9% ultra-pure semiconducting carbon nanotube solution on silicon and how it can be used to fabricate cheap pn junctions.

Moreover, new emerging layered 2D transition metal dichalcogenide (TMDCs) such as MoS2 can offer tunable band gaps by changing only the number of layers. Due to weak van der Waals force between their layers, TMDCs enable us to exfoliate atomically thin layers from their bulk forms, analogous to graphene. In my talk, I will discuss the properties and our recent results of these TMDCs, along with the opportunities offered and the challenges faced in creating van der Waals junctions using atomically thin 2D materials for optoelectronic and solar energy applications.

  • Dr. Moh. R. Amer, Center of Excellence for Green Nanotechnologies, KACST and UCLA

    Dr. Moh. R. Amer

Auditorium between Building 4 and 5 10:35 - 11:05 Details

Dr. Moh. R. Amer, Center of Excellence for Green Nanotechnologies, KACST and UCLA
11:05 am

Rational Design of Photothermal Nanomaterials towards Improved Solar Driven Water Evaporation Efficiency

Given the vast abundance and inexhaustibility of sunlight, tapping into solar energy to produce clean water seems a viable solution to current global challenges of water scarcity and clean energy shortage. Solar driven water evaporation, which uses photothermal materials to capture and convert sunlight to heat so to generate water vapor, is an ancient technology for solar powered clean water production. The old concept of utilizing solar-driven water evaporation to produce clean water resurfaced and was rejuvenated over the past five years because it uses only sunlight without any CO2 emissions during the operation. The rejuvenation of the photothermal processes in the new times gains very helpful hand from nanomaterials. In this presentation, various nano-enabled photothermal materials that are able to capture whole solar spectrum and convent it to heat with almost 100% efficiency will be covered. The recent development in rationally designed photothermal nanomaterials with proper heat loss management that has led to the solar-driven water evaporation efficiency being steadily and significantly improved in the last three years, from ~50% to a near 100%, will be presented.

Auditorium between Building 4 and 5 11:05 - 11:35 Details

Dr. Peng Wang, King Abdullah University of Science and Technology (KAUST)
11:35 am

Holistic approach for HJT cell manufacturing: simplification & cost reduction

Dr. Omid Shojaei
CEO
INDEOtec SA

  • Dr. Omid Shojaei, INDEOtec SA

    Dr.  Omid Shojaei

Auditorium between Building 4 and 5 11:35 - 11:50 Details

Dr. Omid Shojaei, INDEOtec SA
11:50 am

The road-to-market for OPV: an industrial perspective

In recent years Organic Photovoltaics have shown a tremendous growth, achieving efficiencies surpassing 13%. However, the road to commercialization and large-scale deployment for this technology is still paved with challenges, leading to substantial losses in up-scaled modules.

In his talk, Luca will focus on the key requirements allowing to select a material from the early synthesis to the up-scaling phase, discussing the work behind the successful development of formulations for printed OPV. He will then give an insight on the R&D work done at Merck Labs and show recent advances and perspectives of this exciting thin film PV technology.

  • Dr. Luca Lucera, Merck

    Dr. Luca Lucera

Auditorium between Building 4 and 5 11:50 - 12:05 Details

Dr. Luca Lucera, Merck
12:05 pm

Lunch break

Campus Diner

Campus Diner 12:05 - 13:20 Details

Workshop
1:20 pm

Writing and Publishing Scientific Articles

Great papers start with great science. In this talk, we will talk about how to frame scientific results for your target audience, how to present them in a clear way, including tips on structuring papers to maximize impact. I’ll discuss the landscape of scientific publishing and the ethics of publishing.

  • Dr. Elsa Couderc, Nature Energy

    Dr. Elsa Couderc

Auditorium between Building 4 and 5 13:20 - 13:50 Details

Dr. Elsa Couderc, Nature Energy
Young Speaker Session
1:50 pm

Young Speaker Session

1:50 PM: Yanwei Lum (University of California, Berkeley), "Electrochemical reduction of CO2 to multicarbon hydrocarbons and oxygenates"

2:05 PM: Emilie Dauzon (KAUST), "Stretchable Transparent Conducting Electrodes for Photovoltaics and Beyond"

2:20 PM: Zhiping Wang (University of Oxford), "2D–3D heterostructured lead halide perovskites for stable and efficient solar cells"

2:35 PM: Esma Ugur (KAUST), "Improving Morphology, Efficiency, and Reproducibility of n−i−p Planar Perovskite Solar Cells by a Modified Two-Step Preparation Protocol"

2:50 PM: Jun Peng (Australian National University), "High-Efficiency and Stable Perovskite Solar cells with Negligible Hysteresis via Interface Engineering"


The young speaker awards are kindly sponsored by KAUST Industry Collaboration Program (KICP), Industry Partnerships Office and Nature Energy

Auditorium between Building 4 and 5 13:50 - 15:05 Details

3:05 pm

Coffee break

Auditorium between Building 4 and 5 15:05 - 15:25 Details

Conference
3:25 pm

Metal Halide Perovskites: progress towards high efficiency and high stability photovoltaics

  • Prof. Henry Snaith, University of Oxford

    Prof. Henry Snaith

Auditorium between Building 4 and 5 15:25 - 15:55 Details

Prof. Henry Snaith, University of Oxford
3:55 pm

Surpassing 10% Efficiency Benchmark for Nonfullerene Organic Solar Cells by Scalable Coating in Air From Single Nonhalogenated Solvent

The field of organic solar cells (OSCs) continues to grow rapidly as new non-fullerene small molecule acceptors are created to boost device efficiencies above 13% and with 15% in sight. The commercialization of nonfullerene OSCs relies critically on the response and lifetime under typical operating conditions (for instance, temperature, humidity) and the ability of scale-up fabrication in the cheapest and most benign way possible. Realizing high efficiency in printed nonfullerene OSCs via scalable materials and less toxic solvents remains a grand challenge, a challenge that is now timely to address as OSC efficiency in research devices has improved so much.

In order to continue advancing scalable printing, our group explored chlorine-free, in air blade-coating for fabricating high performance OSCs. We have also been able to quantify the molecular packing, complex morphology, drying dynamics, and key device performance metrics of the blade-coated polymer:fullerene[1] and polymer:polymer[2] OSCs with the use of advanced X-ray scattering and in-situ spectroscopic ellipsometry tools. Using this scalable coating method, we are able to achieve an efficiency of nearly 11%[3] with a new photoactive combination FTAZ:IT-M, despite processing in air with a humidity of ~50%. More importantly, these blade-coated FTAZ:IT-M devices are very stable against high-temperature (150 °C) heating and using aged solution stored up to 20 days in air shows only a small performance loss. Together, the new material system and approach yield the highest reported performance for nonfullerene OSC devices by a coating technique approximating scalable fabrication methods. The quantitative relations and associated insights can aid in the future development of low-cost, low-toxicity, and high-stability non-fullerene OSCs that highly adhere to environmental and health safety regulations to decrease the energy losses and improve device efficiency. Our results also imply that these nonfullerene OSCs have the potential to catch up with perovskites in performance without the stability and toxicity issues.

Auditorium between Building 4 and 5 15:55 - 16:25 Details

Dr. Harald Ade, Department of Physics, Organic and Carbon Electronics Lab (ORaCEL), North Carolina State University
4:25 pm

Thermal Energy Storage Systems Tested at the Masdar Institute Solar Platform

Dr. Nicolas Calvet will present the R&D activity developed at the Masdar Institute Solar Platform (MISP) mainly on CSP and TES.
He will introduce the solar platform missions and will focus on 2 specific projects. The first one is a 1 MWh prototype of concrete storage tested in collaboration with EnergyNest (Norway). The second one is the World’s first direct absorption molten salt solar receiver/storage tested in collaboration with MIT (USA). He will conclude by presenting the future projects of the MISP.

  • Dr. Nicolas Calvet, Masdar Institute of Science and Technology

    Dr. Nicolas Calvet

Auditorium between Building 4 and 5 16:25 - 04:55 Details

Dr. Nicolas Calvet, Masdar Institute of Science and Technology
4:55 pm

Ultimate and Global Performance Limits of Bifacial Tandem Solar Cells: Can HIT-Perovskite PV Reach this Fundamental Limit?

A solar cell is horribly inefficient. Had the sunlight not been free, no one would care about an “engine” that wastes two-thirds of the input energy at the cell level and five-sixths of the incident energy at the farm level. A bifacial tandem cell promises to return much of the wasted energy, especially in the high-albedo sandy deserts of Middle East where soiling resistant vertical bifacial farms can radiatively cool through the cloudless skies. In this talk, I will discuss the ultimate performance limits and global energy yield of this technology. I will also illustrate the design challenges to achieve the limiting performance with a Perovskite-Silicon bifacial tandem solar cells.

  • Dr. Ashraf Alam, Purdue University

    Dr. Ashraf Alam

Auditorium between Building 4 and 5 16:55 - 17:25 Details

Dr. Ashraf Alam, Purdue University
7:30 pm

Award ceremony and dinner

Al Marsa Yacht Club
Sponsored by the KAUST Industry Collaboration Program (KICP)

Al Marsa Yacht Club 19:30 - 21:00 Details