Type conversion, contacts, and surface effects in electroplated CdTe films

Efficient electroplated CdS/CdTe solar cells can be fabricated by heat treating and type-converting the n-CdTe films deposited on CdS layers. In this paper, various mechanisms which may give rise to the conversion of electroplated CdTe films from n to p type are investigated. It is concluded that Cd...

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Bibliographic Details
Published in:Journal of applied physics 1985-11, Vol.58 (10), p.3809-3813
Main Authors: BASOL, B. M, SIMON OU, S, STAFSUDD, O. M
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Exact sciences and technology
Natural energy
Solar energy
Solar thermal conversion
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Summary:Efficient electroplated CdS/CdTe solar cells can be fabricated by heat treating and type-converting the n-CdTe films deposited on CdS layers. In this paper, various mechanisms which may give rise to the conversion of electroplated CdTe films from n to p type are investigated. It is concluded that Cd-vacancy generation is the main mechanism of type conversion. Possible effects of oxygen on this mechanism are also discussed. Evaporated Au contacts to electroplated p-CdTe films were studied. It was found that the Au contacts depleted the excess Te present on the surface of Br2-methanol etched p-CdTe films. Oxygen was found to affect the electrical characteristics of such contacts.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.335595