Journal
THIN SOLID FILMS
Volume 516, Issue 20, Pages 7079-7083Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2007.12.124
Keywords
solar cells; cadmium telluride; thermal treatment; chlorine
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In order to obtain high efficiency CdS/CdTe solar cells, a CdTe heat treatment in a Cl-2 containing atmosphere is necessary. Normally, this treatment is done by depositing a CdCl2 thin film on top of CdTe and by heating the system in air at a fixed temperature. This step is disadvantageous in a large scale fabrication process because it involves the use of CdCl2 that it is difficult to be handled. We replaced this treatment by using a gas (HCF2Cl) that is stable, inert and not toxic at room temperature and eliminates the step of CdCl2 evaporation and subsequent chemical etching. (c) 2007 Elsevier B.V. All rights reserved.
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