Crystalline donor-acceptor conjugated polymers for bulk heterojunction photovoltaics

被引:70
|
作者
Jiang, Jian-Ming [1 ]
Yuan, Mao-Chuan [1 ]
Dinakaran, K. [2 ]
Hariharan, A. [2 ]
Wei, Kung-Hwa [1 ]
机构
[1] Natl Chiao Tung Univ, Hsinchu, Taiwan
[2] Anna Univ, Dept Chem, Chennai 600025, Tamil Nadu, India
关键词
EFFICIENT SOLAR-CELLS; 2,1,3-BENZOOXADIAZOLE UNITS; RATIONAL DESIGN; PERFORMANCE; COPOLYMERS; DEVICE; THIOPHENE; BITHIOPHENE; STACKING; THIAZOLE;
D O I
10.1039/c2ta00965j
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Molecular engineering of conjugated polymers for tuning their energy bands is an important process in the quest for highly efficient bulk heterojunction (BHJ) polymer photovoltaic devices. One effective approach is to construct a conjugated polymer by conjugating two chemical units possessing different electron donating (donor) and accepting (acceptor) capabilities. Conjugated copolymers featuring donor-acceptor (D/A) subunits are promising materials for solar cell applications because of their tunable energy bands and solubility that can be tailored to the performances of the photovoltaic devices. Under proper processing conditions, the conjugated polymers with rigid and planar D/A segments can undergo self-assembly to form crystalline structures that improve charge carrier mobility and provide better resistance to the permeation of water and oxygen compared to amorphous polymers. Conjugated polymers with D/A structure have been investigated thoroughly over the last few years. In this highlight, we present an overview of recent developments in BHJ organic photovoltaics employing D/A crystalline copolymers as active layer materials for photon-to-electron conversion, with particular emphasis on crystalline D/A polymers featuring newly developed acceptor structures, including thieno [3,4-c]pyrrole-4,6-dione, diketo-pyrrole-pyrrole, bithiazole, thiazolothiazole and thieno[3,2-b]thiophene moieties, and conclude with future perspectives.
引用
收藏
页码:4415 / 4422
页数:8
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