title: Hexacyclic lactam building blocks for highly efficient polymer solar cells.
abstract: Two hexacyclic lactam building blocks, TD1 and TD2, and four D-A copolymers have been developed. Compared with thiophene copolymers, selenophene analogues PSeTD1 and PSeTD2 possess medium optical bandgaps, better packing, higher hole mobilities, enhanced EQE, and higher J(sc). Inverted PSeTD2:PC71BM solar cells exhibited a decent PCE of 8.18%, which is a record for D-A copolymers using selenophene as the donor unit.
authors.affiliation: National Center for Nanoscience and Technology, Beijing 100190, China. ding@nanoctr.cn xhqiu@nanoctr.cn.
authors.forename: Jiamin
authors.initials: J
authors.lastname: Cao
authors.forename: Chuantian
authors.initials: C
authors.lastname: Zuo
authors.forename: Bin
authors.initials: B
authors.lastname: Du
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Qiu
authors.forename: Liming
authors.initials: L
authors.lastname: Ding