We developed the donor–acceptor (D-A) type π-conjugated polymers including the 1,3,4-thiadiazole unit (TDz) with dodecyl side chains for the polymer solar cell application (PSC). The PSC using TDz polymers showed high open-circuit voltage up to 0.965 V based on the deep highest occupied molecular orbital energy levels in the range −5.50 to −5.20 eV. Especially, the D-A polymer with the thienylene vinylene unit yielded the highest Jsc and power conversion efficiency of 0.529% among all the polymers.
- Seijiro Fukuta
- Zhongqiang Wang
- Tomoya Higashihara
