High-performance wide-bandgap copolymers based on indacenodithiophene and indacenodithieno[3,2-b]thiophene units

被引：25

作者：

Cai, Yunhao ^{[1
]}

Zhang, Xiaolong ^{[1
]}

Xue, Xiaonan ^{[1
]}

Wei, Donghui ^{[2
]}

Huo, Lijun ^{[1
]}

Sun, Yanming ^{[1
]}

机构：

[1] Beihang Univ, Sch Chem, Beijing 100191, Peoples R China

[2] Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450001, Henan, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2017年 / 5卷 / 31期

基金：

中国国家自然科学基金;

关键词：

ORGANIC SOLAR-CELLS; POLYMER PHOTOVOLTAIC CELLS; CONJUGATED POLYMERS; CHARGE-TRANSPORT; RATIONAL DESIGN; SIDE-CHAINS; EFFICIENCY; ACCEPTOR; TRANSISTORS; FILM;

D O I：

10.1039/c7tc01909b

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, we demonstrated the synthesis and characterization of two novel donor-acceptor type conjugated polymers, IDT-T1 and IDTT-T1, which consist of indacenodithiophene (IDT) and indacenodithieno[3,2-b] thiophene (IDTT) donor and 1,3-bis(5-bromothiophen-2-yl)-5,7-bis(2-ethylhexyl)-4H,8H-benzo[1,2-c: 4,5-c] dithiophene-4,8-dione (T1) acceptor building blocks. The resulting copolymers exhibited a wide bandgap of about 1.90 eV with a comparatively low-lying highest occupied molecular orbital (HOMO) energy level. However, IDTT-T1 with an extended fused-ring unit was found to have better coplanarity and higher carrier mobility (0.11 cm(2) V-1 s(-1)). As a consequence, organic solar cells employing IDTT-T1 as the donor material afforded a power conversion efficiency (PCE) of 6.58%, while IDT-T1-based devices yielded a relatively lower PCE of 6.26%.

引用

页码：7777 / 7783

页数：7

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