Enhancement in open circuit voltage through a cascade-type energy band structure

被引：59

作者：

Sista, Srinivas

Yao, Yan

Yang, Yang ^{[1
]}

Tang, Ming Lee

Bao, Zhenan

机构：

[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

[2] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 22期

关键词：

D O I：

10.1063/1.2817935

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper, we report a method to increase the open-circuit voltage (V-OC) of an organic solar cell by inserting an interfacial layer between the donor and acceptor layers to form a cascade-type energy band structure. We demonstrate its feasibility using a recently reported asymmetric pentacene derivative, tetraceno[2,3-b]thiophene (TT) as a donor material, C-60 as an acceptor material, and copper phthalocyanine (CuPc) as the sandwich layer. The V-OC was increased from 0.3 V for the device with no CuPc sandwich layer to 0.56 V for 13 nm thick CuPc layer. The power conversion efficiency (PCE) of the device with 13 nm CuPc layer was 1.53% and the fill factor (FF) was 0.64, in comparison to TT/C-60 device which had a PCE of 0.78% and a FF of 0.52. (C) 2007 American Institute of Physics.

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页数：3

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