Quaterthiophene-Benzobisazole Copolymers for Photovoltaic Cells: Effect of Heteroatom Placement and Substitution on the Optical and Electronic Properties

被引：41

作者：

Bhuwalka, Acua ^{[1
]}

Mike, Jared F. ^{[1
]}

He, Meng ^{[2
,3
]}

Intemann, Jeremy J. ^{[1
]}

Nelson, Toby ^{[4
]}

Ewan, Monique D. ^{[1
]}

Roggers, Robert A. ^{[1
]}

Lin, Zhiqun ^{[2
,5
]}

Jeffries-El, Malika ^{[1
]}

机构：

[1] Iowa State Univ, Dept Chem, Ames, IA 50011 USA

[2] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

[3] Fudan Univ, Dept Macromol Sci, Key Lab Mol Engn Polymers, Minist Educ, Shanghai 200433, Peoples R China

[4] Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213 USA

[5] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

来源：

MACROMOLECULES | 2011年 / 44卷 / 24期

基金：

美国国家科学基金会;

关键词：

HETEROJUNCTION SOLAR-CELLS; FIELD-EFFECT TRANSISTORS; PARA-AROMATIC POLYMERS; RIGID-ROD POLYMERS; CONJUGATED POLYMERS; EFFICIENT SYNTHESIS; THERMAL-PROPERTIES; DESIGN; BENZOBISTHIAZOLE; PERFORMANCE;

D O I：

10.1021/ma202133e

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Three new donor-acceptor conjugated polymers were synthesized by combining electron-donating 3-octylthiophenes with various electron-accepting benzobisazoles. The influence of the structural differences of the three benzobisazoles on the electrochemical, optical, and photovoltaic properties of the polymers composed from them was investigated. According to our results, changing the arrangement of the oxygen atoms of the benzobisoxzoles from the cis to trans orientation slightly stabilized both the HOMO and LUMO levels, whereas replacing the oxygen atoms in trans-BBO with sulfur atoms only stabilized the HOMO level. Bulk heterojunction photovoltaic devices were fabricated by using the copolymers as electron donors and PC71BM ([6,6]-phenyl C-71-butyric acid methyl ester). It was found that open-circuit voltages (V(oc)s) as high as 0.86 V, and power conversion efficiencies (PCEs) up to 1.14%, were obtained under simulated AM 1.5 solar irradiation of 100 mW/cm(2). Field-effect transistors based on these polymers exhibited hole mobilities as high as of 4.9 x 10(-3) cm(2)/(V s) with the trans-BBO polymer giving the best performance in both devices.

引用

页码：9611 / 9617

页数：7

共 72 条

[1] Benzobisthiazole-Based Donor-Acceptor Copolymer Semiconductors for Photovoltaic Cells and Highly Stable Field-Effect Transistors [J].