Organic photovoltaic cells with high open circuit voltages based on pentacene derivatives

被引：42

作者：

Palilis, Leonidas C. ^{[1
]}

Lane, Paul A. ^{[1
]}

Kushto, Gary P. ^{[1
]}

Purushothaman, Balaji ^{[2
]}

Anthony, John E. ^{[2
]}

Kafafi, Zakya H. ^{[1
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

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

来源：

ORGANIC ELECTRONICS | 2008年 / 9卷 / 05期

关键词：

pentacene; organic photovoltaics; fullerene; morphology;

D O I：

10.1016/j.orgel.2008.05.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Heterojunction organic photovoltaic devices were fabricated using C-60 as the electron acceptor and several pentacene derivatives with triisopropylsilylethynyl functional groups as the electron donor. The open circuit voltage (V-oc) of functionalized pentacene-based cells is significantly higher (0.57-0.90 V) than for cells based on unsubstituted pentacene (0.24 V), due to the higher oxidation potentials of these pentacene derivatives. The performance of pentacene derivative cells is limited by lower Current densities than the reference pentacene/C-60 cell. The absorption spectra of films and Solutions of pentacene derivatives closely resemble one another, leading us to conclude that these films are amorphous in nature. Weak intermolecular coupling in the derivative films results in lower charge mobility and shorter exciton diffusion lengths relative to pentacene. Published by Elsevier B.V.

引用

页码：747 / 752

页数：6

共 28 条

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