Synthesis and photovoltaic properties of a D-A copolymer of dithienosilole and fluorinated-benzotriazole

被引：35

作者：

Min, Jie ^{[1
]}

Zhang, Zhi-Guo ^{[1
]}

Zhang, Maojie ^{[1
]}

Li, Yongfang ^{[1
]}

机构：

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

来源：

POLYMER CHEMISTRY | 2013年 / 4卷 / 05期

关键词：

POLYMER SOLAR-CELLS; CONJUGATED SIDE-CHAIN; OPEN-CIRCUIT-VOLTAGE; HIGHLY EFFICIENT; POLY(3-HEXYLTHIOPHENE)/INDENE-C70 BISADDUCT; COLLECTION LAYER; ACCEPTOR GROUPS; BIS-ADDUCT; HOMO LEVEL; PERFORMANCE;

D O I：

10.1039/c2py20982a

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

An alternative D-A copolymer of a dithienosilole (DTS) donor unit and a fluorinated-benzotriazole (FBTA) acceptor unit with a thiophene pi-bridge, PDTS-DTFBTA, was designed and synthesized, for application as a donor material in polymer solar cells (PSCs). PSCs based on PDTS-DTFBTA : PC70BM (1 : 1, w/w) with thermal annealing at 120 degrees C for 10 min showed a PCE of 3.93% with a V-oc of 0.64 V, which is slightly improved in comparison with its analogous polymer (PDTS-DTBTA) without the fluorine substitution. By using indene-C-60 bisadduct (ICBA) instead of PC70BM as acceptor, the PCE was improved to 4.99% with a high V-oc of 0.85 V. PDTS-DTFBTA is the first reported fluorinated D-A copolymer which shows improved photovoltaic performance with ICBA as acceptor compared to PCBM.

引用

页码：1467 / 1473

页数：7

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