Er rare-earth ion incorporation in sol-gel SnO2
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Data
2003-12
Autores
Morais, Evandro Augusto
Scalvi, Luis Vicente De Andrade [UNESP]
Geraldo, Viviany
Ribeiro, Sidney José Lima [UNESP]
Santilli, Celso Valentim [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
ABM, ABC, ABPol
Resumo
Er-doped SnO2 thin films and xerogels are obtained by sol-gel technique. In order to understand the Er³+ rare-earth ion activity in SnO2 matrix, a characterization of Er incorporation is done through emission and excitation spectra of xerogels, besides thin film electrical characterization. Effects to grain dimensions are also analyzed based on X-ray diffraction data showing the particle growth with annealing temperature and inhibition of this growth by Er doping. Electrical characterization results suggest that Er³+ has an acceptor-like character in SnO2, and that codoping with Yb³+ allows an energy transfer process Yb³+ -> Er³+.
Descrição
Palavras-chave
tin-dioxide, sol-gel, erbium, X-ray diffraction
Como citar
Materials Research. São Carlos, SP, Brazil: ABM, ABC, ABPol, v. 6, n. 4, p. 445-449, 2003.