Photoluminescence of BaZrO3 explained by a order/disorded transformation

Autor(es)

Aguiar, E. C. ^[1] ; Simoes, A. Z. ^[2] ; Paskocimas, C. A. ^[1] ; Cilense, M. ^[3] ; Longo, E. ^[3] ; Varela, J. A. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed Rio Grande do Norte, Dept Ciencia & Engn Mat, BR-14800900 Natal, RN - Brazil

^[2] Univ Estadual Paulista Unesp, Fac Engn Guaratingueta, BR-12516410 Guaratingueta, SP - Brazil

^[3] UNESP, Inst Quim, Dept Quim Fis, LIEC, BR-14800900 Araraquara, SP - Brazil

• Tipo de documento: Artigo de Revisão
• Fonte: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS; v. 26, n. 4, p. 1993-2001, APR 2015.
• Citações Web of Science: 5

Resumo

A hydrothermal (HTMW) microwave method was used to synthesize ordered-disordered BaZrO3 (BZ) nanoparticles at temperature of 140 A degrees C with times ranging from 15 min to 2 h. X-ray diffraction results verified the formation of BZ crystallites at a soaking time of 2 h while infrared data showed no traces of carbonate. Field emission scanning microcopy revealed a homogeneous size distribution of nanometric BZ powders. HTMW produced nanoparticles of pure BZ phase, with a size ranging from 40 to 80 nm. These results are in agreement with Raman scattering values which show that the HTMW synthesis route is rapid and cost effective. This method could be used as an alternative to obtain BZ nanoparticles as compared to other chemical methods. Intense photoluminescence in disordered BZ powders was observed at room temperature. The key of mystery of the intense PL emission is related to order-disorder structural in BZ lattice. (AU)

• Processo FAPESP: 08/57872-1 - Instituto Nacional de Ciências dos Materiais em Nanotecnologia
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs