We report a photoresponsive polythiophene derivative containing a photocleavable coumarin group with an octyloxy side chain as a solubilizing group. This polymer enables fabrication of solution-processed polymer film owing to the solubilizing group. Photoirradiation at 313 nm gives the photocleaved side chain, yielding a carboxyl group. Formation of the carboxyl group causes insoluble polythiophene. Change in the solubility provides a photopatterned film through a photomask. In addition, the photocleaved polythiophene film exhibits a 104-fold increase in the electrical conductivity by chemical doping.
- Jyorthana Rajappa Muralidhar
- Koichi Kodama
- Masuki Kawamoto
