Improvement in open circuit voltage of organic solar cells by inserting a thin phosphorescent iridium complex layer

被引：59

作者：

Huang, Jiang ^{[1
]}

Yu, Junsheng ^{[1
]}

Guan, Zhiqiang ^{[1
]}

Jiang, Yadong ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Sch Optoelect Informat, Chengdu 610054, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 14期

基金：

美国国家科学基金会;

关键词：

PHOTOVOLTAIC CELLS; FILMS; PERFORMANCE; EFFICIENCY; PENTACENE;

D O I：

10.1063/1.3492838

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors develop organic solar cells (OSCs) with a multicharge separation (MCS) interface by inserting similar to 4 nm thin layer of phosphorescent bis(2-(4- tertbutylphenyl) benzothiazolato-N,C(2)) iridium (acetylacetonate) (t-bt)(2)Ir(acac) comparing with copper phthalocyanine (CuPc) between pentacene/C(60) heterojunction. The result showed that open circuit voltage is remarkably enhanced without obviously changing external quantum efficiency eta(EQE) and short-circuit current density. As a result, power conversion efficiency is improved from 1.53% for pentacene/C(60) device to 1.83% with sandwich layer (t-bt)(2)Ir(acac) and 1.98% with CuPc. Moreover, a suitable equivalent circuit model is proposed to intuitively reveal the inner photogeneration process of OSC with MCS interface. (C) 2010 American Institute of Physics. [doi:10.1063/1.3492838]

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页数：3

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