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A Thieno[3,2‐c]Isoquinolin‐5(4H)‐One Building Block for Efficient Thick‐Film Solar Cells
Author(s) -
Li Dan,
Xiao Zuo,
Wang Shizhe,
Geng Xinjian,
Yang Shangfeng,
Fang Junfeng,
Yang Huai,
Ding Liming
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201800397
Subject(s) - active layer , materials science , copolymer , polymer solar cell , acceptor , energy conversion efficiency , organic solar cell , fullerene , electron acceptor , layer (electronics) , photovoltaic system , open circuit voltage , solar cell , polymer , optoelectronics , photochemistry , nanotechnology , organic chemistry , chemistry , voltage , composite material , physics , condensed matter physics , quantum mechanics , ecology , thin film transistor , biology
An aromatic lactam acceptor unit, thieno[3,2‐c]isoquinolin‐5(4H)‐one (TIQ), is developed. Compared with its analogues, dithieno[3,2‐b:2′,3′‐d]pyridin‐5(4H)‐one (DTP) and phenanthridin‐6(5H)‐one (PN), TIQ shows its advantage in constructing donor–acceptor (D–A) copolymers for efficient solar cells. TIQ‐based D–A copolymer PTIQ4TFBT delivers a power conversion efficiency (PCE) of 10.16% in polymer:fullerene solar cells, while those based on DTP and PN copolymers, PDTP4TFBT and PPN4TFBT, afford PCEs around 8.5%. The higher performance of PTIQ4TFBT:PC 71 BM solar cells originates from enhanced short‐circuit current density ( J sc ) and fill factor (FF), because of favorable morphology, less bimolecular recombination, and balanced charge transport in the active layer. Moreover, the performance for PTIQ4TFBT:PC 71 BM solar cells is less sensitive to active layer thickness than PDTP4TFBT:PC 71 BM and PPN4TFBT:PC 71 BM solar cells. Over 8% PCEs can be obtained from PTIQ4TFBT:PC 71 BM solar cells when the active layer thickness is over 500 nm.