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Sensitivity of Nanocrystalline Copper Sulfide/Cadmium Sulfide Heterojunction in Near-Ir Region

Published online by Cambridge University Press:  10 February 2011

M. V. Artemyev ,
D. V. Sviridov ,
N. P. Gaponik  and
A. M. Maljarevich
M. V. Artemyev
Affiliation:
Physico-Chemical Research Institute of Belarusian State University, Minsk, 220080, BELARUS, artemyev@chem.bsu.minsk.by
D. V. Sviridov
Affiliation:
Physico-Chemical Research Institute of Belarusian State University, Minsk, 220080, BELARUS, artemyev@chem.bsu.minsk.by
N. P. Gaponik
Affiliation:
Physico-Chemical Research Institute of Belarusian State University, Minsk, 220080, BELARUS, artemyev@chem.bsu.minsk.by
A. M. Maljarevich
Affiliation:
International Laser Center at Belarussian Polytechnic Academy, Minsk, BELARUS
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Abstract

The photovoltaic p-n heterojunction based on thin layer of 10 nim size copper sulfide nanocrystals and evaporated cadmium sulfide film was prepared. The partial oxidation of copper sulfide nanocrystals prior the fabrication of the heterostructure results in the formation of additional absorption band in near-IR region beyond the fundamental absorption of bulk copper sulfide and cadmium sulfide. This band can be attributed to the intervalence charge transfer between copper ions in the core and in the oxidized shell. The photovoltaic effect observed in the near-IR region at ITO/nano-CuS/CdS/Au heterojunction is due to the generation of the electron-hole pairs in the CuS nanocrystalline film followed by the separation of charge carriers at the CuS/CdS junction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 417: Symposium EE – Optoelectronic Materials-Ordering, Composition Modulation, and Self-Assembled … , 1995 , 181
Copyright
Copyright © Materials Research Society 1996

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