The Influence of Oxygen Atoms on Conformation and π-π Stacking of Ladder-Type Donor-Based Polymers and Their Photovoltaic Properties

被引：8
|
作者：
Qin, Tong [1 ]
Zang, Yue [2 ]
Bai, Wei-Yun [1 ]
Yao, Kai [3 ]
Xu, Yun-Xiang [1 ]
机构：
[1] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China
[2] Hangzhou Dianzi Univ, Elect & Informat Coll, Xiasha Campus, Hangzhou 310018, Zhejiang, Peoples R China
[3] Nanchang Univ, Inst Photovolta, Nanchang 330031, Jiangxi, Peoples R China
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2017年 / 38卷 / 16期
基金：
中国国家自然科学基金;
关键词：
ladder-type donors; oxygen atoms; photovoltaic properties; pi-pi stacking; twisted conformation; ENERGY-LEVEL MODULATION; OPEN-CIRCUIT VOLTAGE; ORGANIC SOLAR-CELLS; HIGHLY EFFICIENT; CONJUGATED POLYMERS; ELECTRON-ACCEPTOR; CHARGE-TRANSPORT; PERFORMANCE; TRANSISTORS; COPOLYMERS;
D O I：
10.1002/marc.201700156
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A novel ladder-type donor pyran-bridged indacenodithiophene (IDTP) is developed by introducing two oxygen atoms into indacenodithiophene unit. IDTP possesses a twisted backbone and leads to facially asymmetric arrangement of side chains, resulting in enhanced local pi-pi stacking of according polymer poly[(5,5,11,11-tetrakis(4-octylphenyl)-5,11-dihydrothieno[2', 3': 5,6] pyrano[3,4-g] thieno[3,2-c]isochromene)-alt-4,7-(5-fluoro-2,1,3-benzothiadiazole)] (PIDTP)-FBT, which shows extended absorption range. Moreover, oxygen atoms render deeper highest occupied molecular orbital (HOMO) levels of poly[indacenodithiophene-alt-4,7-(5-fluoro-2,1,3-benzothiadiazole)] (PIDTP)-FBT compared with PIDT-FBT, therefore bringing a higher open-circuit voltage (V-oc).
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页数：5
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