Synthesis and Characterization of Dioctyloxybenzo[1,2-b:4,3-b′]-dithiophene-Containing Copolymers for Polymer Solar Cells

被引：60

作者：

Zhang, Maojie ^{[1
]}

Sun, Yeping ^{[1
]}

Guo, Xia ^{[1
]}

Cui, Chaohua ^{[1
]}

He, Youjun ^{[1
]}

Li, Yongfang ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

来源：

MACROMOLECULES | 2011年 / 44卷 / 19期

关键词：

HIGH PHOTOVOLTAIC PERFORMANCE; OPEN-CIRCUIT VOLTAGE; CONJUGATED POLYMER; HOMO LEVEL; EFFICIENCY; BANDGAP; THIAZOLOTHIAZOLE; POLYTHIOPHENES; BITHIAZOLE; ABSORPTION;

D O I：

10.1021/ma201565f

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 series of D-A copolymers containing dioctyloxybenzo[1,2-b:4,3-b']dithiophene (BdT) donor unit and different acceptor unit of bithiazole (BTz), thiazolo[5,4-d]-thiazole (TTz), dithienylylbenzothiadiazole (DTBT), and dithienyl-pyrrolo[3,4-c]pyrrole-1,4-dione (DPP), PBdT-BTz, PBdT-TTz, PBdT-DTBT, and PBdT-DPP, were synthesized for the application as donor materials in polymer solar cells (PSCs). Bandgaps and HOMO (the highest occupied molecular orbital) energy levels of the copolymers were tuned effectively by using different acceptor units from 2.01 and -5.16 eV for PBdT-BTz, to 1.91 and -5.19 eV for PBdT-TTz, 1.70 and -5.09 eV for PBdT-DTBT, and 1.41 and -5.01 eV for PBdT-DPP. The PSCs based on the blend of PBdT-TTz (with a lower HOMO of -5.19 eV) and PC70BM (1:3 w/w) exhibited a power conversion efficiency of 3.40% with a J(sc) of 5.50 mA/cm(2), a high V-oc of 0.90 V, and a high FF of 68.7%.

引用

页码：7625 / 7631

页数：7

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