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An Electron‐Deficient Building Block Based on the B←N Unit: An Electron Acceptor for All‐Polymer Solar Cells
Author(s) -
Dou Chuandong,
Long Xiaojing,
Ding Zicheng,
Xie Zhiyuan,
Liu Jun,
Wang Lixiang
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201508482
Subject(s) - homo/lumo , electron acceptor , acceptor , electron , energy conversion efficiency , materials science , polymer solar cell , polymer , absorbance , electron donor , electron transport chain , organic solar cell , solar cell , photochemistry , optoelectronics , chemistry , physics , organic chemistry , molecule , condensed matter physics , biochemistry , chromatography , quantum mechanics , composite material , catalysis
A double B←N bridged bipyridyl (BNBP) is a novel electron‐deficient building block for polymer electron acceptors in all‐polymer solar cells. The B←N bridging units endow BNBP with fixed planar configuration and low‐lying LUMO/HOMO energy levels. As a result, the polymer based on BNBP units (P‐BNBP‐T) exhibits high electron mobility, low‐lying LUMO/HOMO energy levels, and strong absorbance in the visible region, which is desirable for polymer electron acceptors. Preliminary all‐polymer solar cell (all‐PSC) devices with P‐BNBP‐T as the electron acceptor and PTB7 as the electron donor exhibit a power conversion efficiency (PCE) of 3.38 %, which is among the highest values of all‐PSCs with PTB7 as the electron donor.