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Title: Thermodynamic evaluation of the CdTe deposition by an elemental co-evaporation method under isothermal transport conditions

Abstract

Thermodynamic potential diagrams were used to predict the conditions for depositing cadmium telluride thin films from two independent elemental sources, Cd and Te, while keeping sources and substrate at the same temperature. The potential diagrams also allowed the evaluation of the influence of gaseous contaminants, such as oxygen, on the formed condensed phases. The method may be applied to the deposition of other compounds as long as their vapor pressures are much smaller than the vapor pressures of the constituent elements. The thermodynamic calculation suggested that the film may be deposited under total pressure of 10-4 mbar and at temperatures as low as 450 deg. C. This total pressure is easily achieved by a mechanical pump and the low temperature range allows the use of low cost glass substrates. The preliminary results showed that the films deposited under the conditions predicted by the thermodynamic calculations were uniform and crystalline, as confirmed by scanning electron microscopy and X-ray diffraction.

Authors:
 [1];  [2];  [3]
  1. Pontificia Universidade Catolica do Rio de Janeiro, Departamento de Ciencia dos Materiais e Metalurgia, Rua Marques de Sao Vicente, 225 Gavea, 22453-900 Rio de Janeiro, RJ (Brazil). E-mail: mriccio@dcmm.puc-rio.br
  2. Instituto Militar de Engenharia, Departamento de Engenharia Mecanica e de Materiais, Praca General Tiburcio, 80 Urca, 22290-270 Rio de Janeiro, RJ (Brazil)
  3. Pontificia Universidade Catolica do Rio de Janeiro, Departamento de Ciencia dos Materiais e Metalurgia, Rua Marques de Sao Vicente, 225 Gavea, 22453-900 Rio de Janeiro, RJ (Brazil)
Publication Date:
OSTI Identifier:
20891597
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 41; Journal Issue: 1; Other Information: DOI: 10.1016/j.materresbull.2005.07.036; PII: S0025-5408(05)00291-6; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CADMIUM TELLURIDES; DEPOSITION; EVAPORATION; GLASS; PHASE DIAGRAMS; SCANNING ELECTRON MICROSCOPY; SUBSTRATES; THIN FILMS; VAPOR PRESSURE; X-RAY DIFFRACTION

Citation Formats

Ribeiro, M.C.R., Cruz, L.R., and Avillez, R.R. de. Thermodynamic evaluation of the CdTe deposition by an elemental co-evaporation method under isothermal transport conditions. United States: N. p., 2006. Web. doi:10.1016/j.materresbull.2005.07.036.
Ribeiro, M.C.R., Cruz, L.R., & Avillez, R.R. de. Thermodynamic evaluation of the CdTe deposition by an elemental co-evaporation method under isothermal transport conditions. United States. doi:10.1016/j.materresbull.2005.07.036.
Ribeiro, M.C.R., Cruz, L.R., and Avillez, R.R. de. Thu . "Thermodynamic evaluation of the CdTe deposition by an elemental co-evaporation method under isothermal transport conditions". United States. doi:10.1016/j.materresbull.2005.07.036.
@article{osti_20891597,
title = {Thermodynamic evaluation of the CdTe deposition by an elemental co-evaporation method under isothermal transport conditions},
author = {Ribeiro, M.C.R. and Cruz, L.R. and Avillez, R.R. de},
abstractNote = {Thermodynamic potential diagrams were used to predict the conditions for depositing cadmium telluride thin films from two independent elemental sources, Cd and Te, while keeping sources and substrate at the same temperature. The potential diagrams also allowed the evaluation of the influence of gaseous contaminants, such as oxygen, on the formed condensed phases. The method may be applied to the deposition of other compounds as long as their vapor pressures are much smaller than the vapor pressures of the constituent elements. The thermodynamic calculation suggested that the film may be deposited under total pressure of 10-4 mbar and at temperatures as low as 450 deg. C. This total pressure is easily achieved by a mechanical pump and the low temperature range allows the use of low cost glass substrates. The preliminary results showed that the films deposited under the conditions predicted by the thermodynamic calculations were uniform and crystalline, as confirmed by scanning electron microscopy and X-ray diffraction.},
doi = {10.1016/j.materresbull.2005.07.036},
journal = {Materials Research Bulletin},
number = 1,
volume = 41,
place = {United States},
year = {Thu Jan 05 00:00:00 EST 2006},
month = {Thu Jan 05 00:00:00 EST 2006}
}