Novel benzo[1,2-b:4,5-b’]dithiophene-benzothiadiazole derivatives with variable side chains for high performance solar cells
writer：Qiang Peng, Xiangju Liu, Dan Su, Guanwen Fu, Jun Xu and Liming Dai
keywords：polymer solar cell
source：期刊
specific source：Advanced Materials, 2011,23,4554-4558.
Issue time：2011年
Low band gap copolymers were prepared by incorporating thiophene modified benzo[1,2-b:4,5-b’]dithiophene and alkyloxy or fluorine modified benzothiadiazole as donor and accepter units. These copolymers showed desired deep HOMO and LUMO levels allowing the high Voc and Jsc. PCEs of over 6% are demonstrated in solar cell studies indicating their promising photovoltaic application as donor materials.