PI: Prof. Thomas Anthopoulos
The power conversation efficiency (PCE) of organic photovoltaics (OPVs) has been advancing rapidly in recent years with record values now exceeding 17 and 18% for multi- and single-junction OPVs, respectively. Despite the tremendous progress, however, several scientific and technological challenges still remain. This project aims to address some of these key challenges and demonstrate highly-efficient single cells and monolithic organic/organic tandem solar cells with PCE >20%. The work builds on our recent efforts towards advanced bulk-heterojunction (BHJ) systems, molecular dopants and new interlayer materials. Our recent studies indicate that single junction OPVs incorporating optimal combinations of materials can yield efficiency values in excess of 20%, whilst for tandem cells this upper efficiency limit exceeds 25%. The experimental efforts will be supported by theoretical calculations of the materials interactions and photonic structure of the cells, as well as transient laser spectroscopy measurements to elucidate the key loss processes that would need to be mitigated in order to achieve ultimate performance.
Notable research accomplishments