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Characterization of CdS/CdTe Solar Cells Fabricated by Different Processes

Published online by Cambridge University Press:  01 February 2011

Potlog Tamara ,
G. Khrypunov ,
M. Kaelin ,
H. Zogg  and
A. N. Tiwari
Potlog Tamara
Affiliation:
[email protected], Moldova State University, Physics Department, 60, A.Mateevici str., Chisinau, MD 2009, Moldova, 373.22 577827, 373.22244248
G. Khrypunov
Affiliation:
[email protected], National Technical University, Kharkov Polytechnic Institute, Kharkov, N/A, Ukraine
M. Kaelin
Affiliation:
[email protected], ETH Building-Technopark, Thin Film Physics Group, Laboratory for Solid State Physics, Technoparkstr.1, Zurich, CH-8005, Switzerland
H. Zogg
Affiliation:
[email protected], ETH Building-Technopark, Thin Film Physics Group, Laboratory for Solid State Physics, Technoparkstr.1, Zurich, CH-8005, Switzerland
A. N. Tiwari
Affiliation:
[email protected], ETH Building-Technopark, Thin Film Physics Group, Laboratory for Solid State Physics,, Technoparkstr.1, Zurich, CH-8005, Switzerland
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Abstract

This paper analyses the photovoltaic parameters of the most promising CdS/CdTe solar cells for large application prepared by close space sublimation (CSS) and high vacuum evaporation (HVE). CdS/CdTe solar cells that have an efficiency of~10 % have been studied by current-voltage, capacitance-voltage and quantum efficiency measurements. The current-voltage characteristics show that the addition of small amounts of Cu or Te to back contacts by thermal evaporation improves contact properties by p+-doping the CdTe surface and creating a pseudo-ohmic contact. The cell deposited by CSS seriously suffers in FF compared to the cells prepared by HVE. For both types of the cells above mentioned measurements reveal that the efficiency of CdS/CdTe solar cells fabricated by CSS is limited by a light-dependent shunt resistance and by a high series resistance, but concerning of the cells fabricated by HVE - by the formation of a thick layer of CdS1-xTex at the interface.

Keywords

thin filmdevicesII-VI
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1012: Symposium Y – Thin-Film Compound Semiconductor Photovoltaics-2007 , 2007 , 1012-Y03-30
Copyright
Copyright © Materials Research Society 2007

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