Rawad K. Hallani, Maximilian Moser, Helen Bristow, Maud V. C. Jenart, Hendrik Faber, Marios Neophytou, Emre Yarali, Alexandra F. Paterson, Thomas D. Anthopoulos, Iain McCulloch
J. Org. Chem. 2020, 85, 277-283, (2020)
The synthesis of a new benzocyclobutene based polymer, PSBBB, designed as a dielectric material for use in organic thin film transistors was reported. Compared to conventional benzocyclobutene-based materials, the introduction of a butoxide substituent at the 7-position of the benzocyclobutene pendant unit on the polymer allowed PSBBB to be cross-linked at temperatures of 120 °C, thus rendering it compatible with the processing requirements of flexible plastic substrates. The cross-linking behavior of PSBBB was investigated by Fourier transform infrared spectroscopy and differential scanning calorimetry, demonstrating cross-linking of the polymer after curing at 120 °C. Bottom-gate bottom-contact organic thin film transistors were fabricated using PSBBB as dielectric, affording a performance comparable to that of other dielectric polymeric materials.