Low-temperature photoluminescence of IIaVI films obtained by close-spaced vacuum sublimation

Low-temperature photoluminescence (PL) spectra of CdTe and ZnTe films obtained by a close-spaced volume sublimation technique under different technological conditions (substrate temperatures) were investigated. Analysis of the experimental results made it possible to conclude that the nature of the...

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Bibliographic Details
Published inJournal of luminescence Vol. 132; no. 11; pp. 2885 - 2888
Main Authors Gnatenko, YuP, Bukivskij, P M, Opanasyuk, T S, Kurbatov, DI, Kolesnyk, M M, Kosyak, V V, Khlyap, H
Format Journal Article
LanguageEnglish
Published 01.11.2012
Subjects
Cadmium tellurides
Excitons
Luminescence
Optimization
Photoluminescence
Spectra
Sublimation
Zinc tellurides
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Summary:Low-temperature photoluminescence (PL) spectra of CdTe and ZnTe films obtained by a close-spaced volume sublimation technique under different technological conditions (substrate temperatures) were investigated. Analysis of the experimental results made it possible to conclude that the nature of the structure of the PL spectra observed experimentally is caused by the recombination of the excitons bound to shallow neutral acceptors, donoraacceptor pairs with the participation of the complex acceptors, and the presence of the extended defects like dislocations. The presence of neutral acceptors is related to the Li, Na, P or Cu residual impurities. As a result of the study of the PL spectra of CdTe and ZnTe films the optimal temperature conditions of their growth were determined as the substrate temperature Ts=623 K and 673 K, respectively.
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SourceType-Scholarly Journals-1
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ISSN:0022-2313
DOI:10.1016/j.jlumin.2012.06.003