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Proceedings Paper

Cd1-xMgxTe thin films and top-cells for possible applications in tandem solar cells
Author(s): Omar S. Martinez; David Reyes-Coronado; Xavier Mathew
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Paper Abstract

Thin films of the ternary material Cd1-xMgxTe were developed by the co-evaporation of CdTe and Mg at substrate temperatures ranging from 300 to 400 °C. Films with band gap close to 1.6 eV were deposited on both corning glass as well as CdS/Tec7 substrates depending on the end use. Films were characterized for structure, morphology, composition, optical and optoelectronic properties. Similar to CdTe based solar cells, Cd1-xMgxTe/CdS devices also showed dependence on the vapor chloride annealing temperature and Cu diffusion process. Stability of the material during chloride annealing hampers high temperature annealing and recrystallization. With improved contact processing and post deposition treatments we were able to fabricate Cd1-xMgxTe/CdS devices with efficiency over 7.5%.

Paper Details

Date Published: 20 August 2009
PDF: 7 pages
Proc. SPIE 7409, Thin Film Solar Technology, 74090V (20 August 2009); doi: 10.1117/12.825032
Show Author Affiliations
Omar S. Martinez, Univ. Nacional Autónoma de México (Mexico)
Ctr. de Investicación en Materiales Avanzados (Mexico)
David Reyes-Coronado, Univ. Nacional Autónoma de México (Mexico)
Xavier Mathew, Univ. Nacional Autónoma de México (Mexico)

Published in SPIE Proceedings Vol. 7409:
Thin Film Solar Technology
Alan E. Delahoy; Louay A. Eldada, Editor(s)

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