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Type: Artigo de evento
Title: Er Environment In A-si:h<er> Prepared By Pecvd
Author: Piamonteze C.
Tessler L.R.
Tolentino H.
Do Carmo Martins Alves M.
Weiser G.
Terukov E.
Abstract: The Er local environment of a-Si:H&lt;Er&gt; prepared by PECVD using a metalorganic precursor was determined by EXAFS. We found that in as-deposited samples Er is coordinated to 6 oxygen atoms at 2.28±0.01Å, very similar to Er2O3. Annealing at 420°C hardly affects the Er neighbor-hood, but higher annealing temperatures (starting at 600°C up to 1033°C) decrease the Er-O separation as much as 0.05Å, maintaining the Er average coordination around 6. This is interpreted as due to the formation of a carbon second neighbor shell. Our results show that the Er local environment is not related with the luminescence enhancement for annealing at moderate temperatures.
Rights: fechado
Identifier DOI: 
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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