Wide bandgap conjugated polymers based on bithiophene and benzotriazole for bulk heterojunction solar cells: Thiophene versus thieno[3,2-b]thiophene as -conjugated spacers

被引：7
作者：
Huo, Zejuan [1 ]
Zhang, Peng [1 ]
Li, Jianfeng [1 ]
Tong, Junfeng [1 ]
Yang, Chunyan [1 ]
Dou, Wei [2 ]
Xia, Yangjun [1 ]
机构：
[1] Lanzhou Jiaotong Univ, Key Lab Optoelect Technol & Intelligent Control, Minist Educ, Lanzhou, Gansu, Peoples R China
[2] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou, Gansu, Peoples R China
来源：
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY | 2017年 / 54卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Wide bandgap; thiophene; thieno[3,2-b]thiophene; conjugated polymer; photovoltaic propertites; POWER CONVERSION EFFICIENCY; FIELD-EFFECT TRANSISTORS; PHOTOVOLTAIC APPLICATION; SEMICONDUCTING POLYMERS; HIGH-PERFORMANCE; COPOLYMERS; MOBILITY; DEVICES; SINGLE; UNITS;
D O I：
10.1080/10601325.2017.1309250
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Two wide bandgap (WBG) conjugated polymers, P2T-DTTTAZ and P2T-DTTAZ, with donor--acceptor (D--A) structures was designed and synthesized, utilizing thieno[3,2-b]thiophene (TT) and/or thiophene (T) units as -bridge in conjugated polymer backbone. And, the wider optical band gap (E-g) of approximately 1.98eV for P2T-DTTTAZ and 2.09eV for P2T-DTTAZ were observed. Obviously, replacing T unit with larger conjugated plane TT unit as -bridges, P2T-DTTTAZ resulted in the red shifted absorption and the reduced band gap, compared with these of P2T-DTTAZ. The polymer solar cells (PSCs) with an inverted device structure based on P2T-DTTTAZ or P2T-DTTAZ as donor and [6,6] phenyl-C-61 butyric acid methyl ester (PC61BM) as acceptor were assembled and the photovoltaic properties were also investigated. The power conversion efficiencies (PCEs) of 1.57% for P2T-DTTTAZ and 1.25% for P2T-DTTAZ were obtained.
引用
收藏
页码：565 / 574
页数：10
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