Logo do repositório
 

Enhancement of symmetry-induced photoluminescence in bismuth tungstate microcrystals

Resumo

Bi2WO6 (BWO) powders synthesized via hydrothermal processes were studied in order to determine the effect of structure on photoluminescence (PL). BWO samples were characterized using X-Ray Powder Diffraction, UV–vis diffuse reflectance, field emission scanning electron microscopy, and PL intensity measurements. Orthorhombic structures were observed in all samples. A change in crystal microstructure and optical band gap was observed. The PL intensity obtained with different samples varied, with the highest intensity obtained with BWO fabricated with polyvinylpyrrolidone (PVP). Using Raman spectroscopy, a change in the microcrystal symmetry from P21ab to B2cb was observed and found to be responsible for the increase in photoluminescence.

Descrição

Palavras-chave

Bismuth tungstate, Photoluminescence, Structural change

Idioma

Inglês

Citação

Materials Letters, v. 184, p. 298-300.

Itens relacionados

Unidades

Unidade
Instituto de Química
IQAR
Campus: Araraquara


Departamentos

Cursos de graduação

Programas de pós-graduação