Soluble n-type pentacene derivatives as novel acceptors for organic solar cells

被引：98

作者：

Lim, Yee-Fun ^{[2
]}

Shu, Ying ^{[1
]}

Parkin, Sean R. ^{[1
]}

Anthony, John E. ^{[1
]}

Malliaras, George G. ^{[2
]}

机构：

[1] Univ Kentucky, Dept Chem, Lexington, KY 40506 USA

[2] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14850 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2009年 / 19卷 / 19期

关键词：

PHOTOVOLTAIC CELLS; POLYMER; DESIGN; PERFORMANCE; CHARGE;

D O I：

10.1039/b818693f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

6,13-Bis(triisopropylsilylethynyl) (TIPS)-pentacene has proven to be a promising soluble p-type material for organic thin film transistors as well as for photovoltaics. In this work, we show that adding electron-withdrawing nitrile functional groups to TIPS-pentacene turns it into an n-type material, which can be used as an acceptor for organic solar cells. Several new cyanopentacenes with different trialkylsilyl functional groups have been synthesized. The HOMO-LUMO energy levels can be tuned by varying the number of nitrile groups, while the trialkylsilyl groups control crystal packing and film morphology. Solar cells were fabricated from a blend of poly(3-hexylthiophene) (P3HT) as the donor and the cyanopentacenes as acceptors, and we found that the acceptors that stack in a 1D "sandwich-herringbone" exhibited the best performance of derivatives in this study. A solar cell fabricated from a blend of P3HT and 2,3-dicyano-6,13-bis-(tricyclopentylsilylethynyl) pentacene (2,3-CN2-TCPS-Pn) exhibited a power conversion efficiency of 0.43% under 100 mW cm(-2) AM 1.5 illumination.

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收藏

页码：3049 / 3056

页数：8

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