A rapid improvement in the performance of organic solar cells, light-emitting diodes and field-effect transistors largely originate from the successful development of new conjugated polymers. However, the fundamental question still remains related to the unequal mobility of hole and electron in ..-conjugated polymers. A rational design of polymers is necessary to target n-channel stable polymers, which can work in ambient processing conditions. Our laboratory employs a molecular engineering approach to develop high charge carrier n-channel semiconducting polymers for enhancing the performance of optoelectronic devices. In this seminar, the integrated approach to materials design for enhanced electron mobility will be discussed. Specific emphasis will be placed on the guideline principle of the donor-acceptor approach to rationally design the low band-gap polymers with minimum defect, optimum energy levels and high electron mobility.
1) Mallari A. Naik, N. Venkatramaiah, Catherine Kanimozhi, and Satish Patil*, J. Phy. Chem-C, 2012, 116, 26128-26137
2) Kanimozhi, C.; Yaacobi-Gross, N.; Chou, K. W.; Amassian, A.; Anthopoulos, T. D.; Satish Patil, J. Am. Chem. Soc. 2012, 134, 16532