Synthesis and Photovoltaic Properties of Copolymers Based on Benzo[1,2-b:4,5-b′]dithiophene and Thiophene with Different Conjugated Side Groups

被引：50

作者：

Gu, Zhaojie ^{[1
,2
]}

Tang, Peng ^{[1
,2
]}

Zhao, Bin ^{[1
,2
]}

Luo, Hao ^{[3
]}

Guo, Xia ^{[3
]}

Chen, Huajie ^{[3
]}

Yu, Gui ^{[3
]}

Liu, Xinping ^{[1
,2
]}

Shen, Ping ^{[1
,2
]}

Tan, Songting ^{[1
,2
]}

机构：

[1] Xiangtan Univ, Coll Chem, Key Lab Polymer Mat & Applicat Technol, Xiangtan 411105, Peoples R China

[2] Xiangtan Univ, Coll Hunan Prov, Key Lab Adv Funct Polymer Mat, Xiangtan 411105, Peoples R China

[3] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

来源：

MACROMOLECULES | 2012年 / 45卷 / 05期

基金：

高等学校博士学科点专项科研基金;

关键词：

POLYMER SOLAR-CELLS; PHOTOINDUCED ELECTRON-TRANSFER; ACCEPTOR GROUPS SYNTHESIS; CHARGE-TRANSFER; TRIPHENYLAMINE; CARBAZOLE; BAND; OLIGOMERS; FLUORENE; CHAIN;

D O I：

10.1021/ma202399n

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 novel copolymers (PT-ID, PT-DTBT, and PT-DTBTID) of benzo[1,2-b:4,5-b']dithiophene and thiophene with different conjugated side groups (1,3-indanedione (ID), 4,7-dithien-5-yl-2,1,3-benzodiathiazole (DTBT), and DTBT-ID) were synthesized and developed for polymer solar cell applications. The effects of the different conjugated side groups on the thermal, photophysical, electrochemical and photovoltaic properties of these copolymers were investigated. As the length of the conjugated side groups increased, the absorption of the UV-vis region in solution was red-shifted. By changing the different side groups, the energy levels and band gaps of the resulted copolymers were effectively tuned. The three copolymers exhibit deep HOMO energy level and relatively high open-circuit voltage (V-oc). Bulk heterojunction solar cells with these copolymers as electron donors and (6,6)-phenyl-C-61-butyric acid methyl ester (PC61BM) as an electron acceptor exhibit power conversion efficiencies of 2.48%, 4.18% and 1.16% for PT-ID, PT-DTBT, and PT-DTBTID, respectively.

引用

页码：2359 / 2366

页数：8