Atenção
Fechar
Artigo Científico | Filmes Ferroelétricos | Inglês | 30/06/2003
Autores: Celso Valentim Santilli, Evandro Augusto Morais, Luis Vicente de Andrade Scalvi, Sidney J.L. Ribeiro, Viviany Geraldo
Palavras-chave: erbium, sol-gel, tin-dioxide, x-ray diffraction
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+.
Clique aqui para ler na íntegra
