| 초록 |
Conjugated homopolymers have potential advantages for commercialization of polymer solar cells (PSCs) because they can be synthesized more simply and reproducibly at lower cost than than widely-developing donor-acceptor (D-A) alternating copolymers. However, except for well-known poly(3-hexylthiophene) (P3HT), almost no successful homopolymer-based PSCs have been reported due to their relatively wide band gap and unoptimized energy levels that limit the values of short circuit current (JSC) and open-circuit voltage (VOC) in PSCs. Herein, we report the development of homopolymer that has high light absorption coefficients and nearly perfect energy alignment with that of [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM). Therefore, we were able to produce high-performance PSCs with the power conversion efficiency (PCE) of 6.12%. To the best of our knowledge, this PCE value is one of the highest values reported for the homopolymer donor-based PSCs. |
