Origin of the open circuit voltage of donor-acceptor solar cells: Do polaronic energy levels play a role?

被引：40

作者：

Cravino, Antonio ^{[1
]}

机构：

[1] Univ Angers, CNRS, UMR 6200, Grp Linear Conjugated Syst SCL CIMMA, F-49045 Angers, France

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 24期

关键词：

D O I：

10.1063/1.2817930

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This letter analyzes the influence of the energy of the highest-energy occupied molecular orbital (HOMO) and the single occupied molecular orbital (SOMO) (i.e., the low-energy polaronic level) of different electron donors (D) on the open circuit voltage (V-OC) value delivered by bilayer and bulk-heterojunction solar cells containing fullerenes as acceptor (A). The analysis further confirms that the V-OC of these devices scales with the energy difference between the HOMO of the D and the lowest-energy unoccupied molecular orbital of the A. As observed, a better relationship is obtained if the SOMO energy of the D-extracted from photoinduced absorption spectra-is considered. (C) 2007 American Institute of Physics.

引用

页数：3

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