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Indexed by:期刊论文

Date of Publication:2012-05-01

Journal:JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS

Included Journals:SCIE、EI、Scopus

Volume:73

Issue:5

Page Number:626-629

ISSN No.:0022-3697

Key Words:Hybrid solar cell; Impedance spectroscopy; Electronic transport; Dielectric relaxation

Abstract:Impedance spectroscopy of copper phthalocyanine (CuPc)/n-Si hybrid solar cell was studied. The dielectric relaxation mechanism of the solar cell was analyzed by Cole-Cole plots, indicating the presence of a single relaxation mechanism. The equivalent circuit model consisting of a parallel resistor and capacitor in series with a resistor was found to give a well fit to the experimental data. The conduction mechanism was suggested to be a space-charge limited current with exponential trap distribution. Beside, the dielectric relaxation time of the device was decreased with increasing applied bias voltages. (C) 2012 Elsevier Ltd. All rights reserved.