Full-color phosphors from europium(III)-based organosilicates
Nenhuma Miniatura disponível
Data
2000-01-01
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
Resumo
Room-temperature white light emission materials were synthesized using Eu3+-based hybrid xerogels. Color tunabability across the Commission Internationale de L'Eclairage (x,y) chromaticity diagram was obtained by changing the salt concentration and/or the excitation wavelength. The values of the Ω2 and Ω4 intensity parameters show a highly polarizable Eu3+ local environment. The existence of four available carbonyl oxygen at the salt concentration for each incorporated Eu ion accounts for the greater tendency of the first ligands to bond covalently to the metal ion. A gradual increase in the non-radiative channels as the salt concentration increases is due to the replacement of carbonyl oxygen by water molecules in the Eu3+ first coordination shells.
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Advanced Materials, v. 12, n. 8, p. 594-598, 2000.