title: A lactam building block for efficient polymer solar cells.
abstract: A new lactam acceptor unit, [7,7'-bidithieno[3,2-b:2',3'-d]pyridine]-5,5'(4H,4'H)-dione (BDTP), was developed. A D-A copolymer PThBDTP using BDTP as the acceptor unit and thiophene as the donor unit was synthesized. PThBDTP:PC71BM solar cells gave a decent PCE of 9.13% with a V(oc) of 0.96 V. PThBDTP is one of the few D-A copolymers with PCEs of over 9%.
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: Liu
authors.initials: L
authors.lastname: Qian
authors.forename: Futai
authors.initials: F
authors.lastname: Lu
authors.forename: Jianqi
authors.initials: J
authors.lastname: Zhang
authors.forename: Yaqing
authors.initials: Y
authors.lastname: Feng
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Qiu
authors.forename: Hin-Lap
authors.initials: HL
authors.lastname: Yip
authors.forename: Liming
authors.initials: L
authors.lastname: Ding