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Electronic Properties of CdTe/CdS Solar Cells as Influenced by a Buffer Layer

Published online by Cambridge University Press:  28 January 2016

Y. G. Fedorenko ,
J. D. Major ,
A. Pressman ,
L. Phillips  and
K. Durose
Y. G. Fedorenko*
Affiliation:
Stephenson Institute for Renewable Energy and Department of Physics, School of Physical Sciences, Chadwick Building, University of Liverpool, Liverpool L69 7ZF, UK
J. D. Major
Affiliation:
Stephenson Institute for Renewable Energy and Department of Physics, School of Physical Sciences, Chadwick Building, University of Liverpool, Liverpool L69 7ZF, UK
A. Pressman
Affiliation:
Stephenson Institute for Renewable Energy and Department of Physics, School of Physical Sciences, Chadwick Building, University of Liverpool, Liverpool L69 7ZF, UK
L. Phillips
Affiliation:
Stephenson Institute for Renewable Energy and Department of Physics, School of Physical Sciences, Chadwick Building, University of Liverpool, Liverpool L69 7ZF, UK
K. Durose
Affiliation:
Stephenson Institute for Renewable Energy and Department of Physics, School of Physical Sciences, Chadwick Building, University of Liverpool, Liverpool L69 7ZF, UK
*
*(Email: janina.fedorenko@gmail.com)
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Abstract

We considered modification of the defect density of states in CdTe as influenced by a buffer layer in ZnO(ZnS, SnSe)/CdS/CdTe solar cells. Compared to the solar cells employing ZnO buffer layers, implementation of ZnSe and ZnS resulted in the lower net ionized acceptor concentration and the energy shift of the dominant deep trap levels to the midgap of CdTe. The results clearly indicated that the same defect was responsible for the inefficient doping and the formation of recombination centers in CdTe. This observation can be explained taking into account the effect of strain on the electronic properties of the grain boundary interface states in polycrystalline CdTe. In the conditions of strain, interaction of chlorine with the grain boundary point defects can be altered.

Keywords

II-VIthin filmpolycrystal
Type
Articles
Information
MRS Advances , Volume 1 , Issue 14: Energy and Sustainability , 2016 , pp. 937 - 942
Copyright
Copyright © Materials Research Society 2016 

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References

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