Dithienogermole As a Fused Electron Donor in Bulk Heterojunction Solar Cells

被引：601

作者：

Amb, Chad M. ^{[2
]}

Chen, Song ^{[1
]}

Graham, Kenneth R. ^{[2
]}

Subbiah, Jegadesan ^{[1
]}

Small, Cephas E. ^{[1
]}

So, Franky ^{[1
]}

Reynolds, John R. ^{[2
]}

机构：

[1] Univ Florida, Dept Mat Sci & Engn, Ctr Macromol Sci & Engn, Gainesville, FL 32611 USA

[2] Univ Florida, George & Josephine Butler Polymer Res Lab, Ctr Macromol Sci & Engn, Dept Chem, Gainesville, FL 32611 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 26期

关键词：

CONJUGATED POLYMERS; ENERGY-TRANSFER; PERFORMANCE; EFFICIENCY; STABILITY; ATOM;

D O I：

10.1021/ja204056m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the synthesis and bulk heterojunction photovoltaic performance of the first dithienogermole (DTG)-containing conjugated polymer. Stile polycondensation of a distannyl-DTG derivative with 1,3-dibromo-N-octyl-thienopyrrolodione (TPD) results in an alternating copolymer which displays light absorption extending to 735 nm, and a higher HOMO level than the analogous copolymer containing the commonly utilized dithienosilole (DTS) heterocycle. When polyDTG-TPD:PC70BM blends are utilized in inverted bulk heterojunction solar cells, the cells display average power conversion efficiencies of 7.3%, compared to 6.6% for the DTS-containing cells prepared in parallel under identical conditions. The performance enhancement is a result of a higher short-circuit current and fill factor in the DTG-containing cells, which comes at the cost of a slightly lower open circuit voltage than for the DTS-based cells.

引用

页码：10062 / 10065

页数：4

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