Effect of the highest occupied molecular orbital energy level offset on organic heterojunction photovoltaic cells

被引：39

作者：

Zhang, Minlu ^{[1
]}

Wang, Hui ^{[2
]}

Tang, C. W. ^{[1
,2
]}

机构：

[1] Univ Rochester, Dept Chem Engn, Rochester, NY 14627 USA

[2] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA

来源：

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

关键词：

LIGHT-EMITTING-DIODES; HOLE-TRANSPORT; LAYER; EFFICIENCY; MOBILITY; MODEL;

D O I：

10.1063/1.3491214

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of the highest occupied molecular orbital energy level offset, Delta E(HOMO), on organic photovoltaic cells has been investigated using a set of donor/C(60) heterojunction structures with Delta E(HOMO) up to 1.1 eV provided by various donors. The open-circuit voltage decreases with Delta E(HOMO) whereas the short-circuit current and fill factor increase with Delta E(HOMO) but roll off with Delta E(HOMO) >0.7 eV. These characteristics can be simulated using a Braun-Onsager model and assuming an interfacial charge-transfer state with an initial charge separation distance proportional to Delta E(HOMO) and an increased decay rate at high Delta E(HOMO). (C) 2010 American Institute of Physics. [doi:10.1063/1.3491214]

引用

页数：3

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