Marked Alkyl- vs Alkenyl-Substitutent Effects on Squaraine Dye Solid-State Structure, Carrier Mobility, and Bulk-Heterojunction Solar Cell Efficiency

被引：176

作者：

Bagnis, Diego ^{[2
,3
,5
]}

Beverina, Luca ^{[1
]}

Huang, Hui ^{[2
,3
]}

Silvestri, Fabio ^{[1
]}

Yao, Yan ^{[4
]}

Yan, Henry ^{[4
]}

Pagani, Giorgio A. ^{[1
]}

Marks, Tobin J. ^{[2
,3
]}

Facchetti, Antonio ^{[2
,3
,4
]}

机构：

[1] Univ Milano Bicocca, Dept Mat Sci, I-20125 Milan, Italy

[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[3] Northwestern Univ, Argonne NW Solar Energy Res Ctr, Evanston, IL 60208 USA

[4] Polyera Corp, Skokie, IL 60077 USA

[5] Univ Perugia, NIPLAB INSTM, Dept Civil & Environm Engn, I-05100 Terni, Italy

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 12期

关键词：

POLYMER; PHOTOVOLTAICS; MOLECULE;

D O I：

10.1021/ja100520q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report two new squaraine dyes substituted at the pyrrolic rings with n-hexyl (squaraine 1) or n-hexenyl (squaraine 2) chains. Although internal molecular structure variations are minimal, the presence of the terminal double bond results in a much more compact solid-state structure, dramatically affecting charge transport in the thin films; the hole mobility of 2 is similar to 5x that of 1, and the BHJ OPV power conversion efficiency (PCE) of 2 is similar to 2x that of 1. PCEs surpassing 2% for ambient solution-processed devices are demonstrated, the largest so far achieved for squaraine-based organic solar cells.

引用

页码：4074 / +

页数：4

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