共 32 条
Dipole induced anomalous S-shape I-V curves in polymer solar cells
被引:193
作者:

Kumar, Ankit
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机构:
Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

Sista, Srinivas
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机构:
Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

Yang, Yang
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机构:
Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
机构:
[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
关键词:
FIELD-ASSISTED DISSOCIATION;
INTERPENETRATING NETWORK;
INTERFACE DIPOLE;
RECOMBINATION;
PERFORMANCE;
ELECTRODES;
MECHANISM;
METAL;
D O I:
10.1063/1.3117513
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
A kink is sometimes seen in the I-V curves for organic solar cells. In literature charge blocking has been speculated to be responsible for such kind of anomalous features. In this manuscript, we use poly (3-hexylthiophene):[6, 6]-phenyl-C-61-butyric acid methyl ester as our model polymer system and investigate different device structures using ultraviolet photoelectron spectroscopy as our primary tool to investigate the reason for this S-shaped kink. We attribute this anomalous feature to the presence of strong interface dipoles. We further propose a model based on the standard set of Poisson equation, continuity equation, and current density equations including both drift and diffusion components. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3117513]
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