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Formation of CdxHg1-xTe Layers on CdTe after NP-Etching and HgTe-Graphite Pasting

Published online by Cambridge University Press:  01 February 2011

Yanfa Yan ,
K.M. Jones ,
X. Wu  and
M.M. Al-Jassim
Yanfa Yan
Affiliation:
National Renewable Energy Laboratory (NREL), Golden, CO 80401
K.M. Jones
Affiliation:
National Renewable Energy Laboratory (NREL), Golden, CO 80401
X. Wu
Affiliation:
National Renewable Energy Laboratory (NREL), Golden, CO 80401
M.M. Al-Jassim
Affiliation:
National Renewable Energy Laboratory (NREL), Golden, CO 80401
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Abstract

We report on our investigation of the microstructure and chemical composition at the CdTe/Te-rich interfaces generated by NP-etching polycrystalline and single-crystalline CdTe films and followed with HgTe-graphite pasting and thermal annealing. We find that after this process, a thin layer of CdxHg1-xTe forms between CdTe and Te-rich layers, giving a structure like CdTe/CdxHg1-xTe/Te. High-resolution electron microscopy reveals that the CdxHg1-xTe layer has an epitaxial relationship with the CdTe. No CdxHg1-xTe layer has been observed in bromine/methanol-etched samples or samples with intentionally deposited Te layers.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 763: Symposium B – Compound Semiconductor Photovoltaics , 2003 , B3.2
Copyright
Copyright © Materials Research Society 2003

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