Photoluminescence emission in zirconium-doped calcium copper titanate powders

Autor(es)

Moura, F. ^[1] ; Cabral, A. C. ^[1] ; Rocha, L. S. R. ^[2] ; Aguiar, E. C. ^[3] ; Simoes, A. Z. ^[2] ; Longo, E. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed Itajuba Unifei, Lab Interdisciplinar Mat Avancados, Campus Itabira, Rua Sao Paulo 377, POB 355, BR-3590037 Itabira, MG - Brazil

^[2] Univ Estadual Paulista Unesp, Fac Engn Guaratingue, Av Dr Ariberto Pereira Cunha 333, POB 355, BR-12516410 Guaratingueta, SP - Brazil

^[3] Univ Estadual Paulista, Inst Quim, Lab Interdisciplinar Ceram, POB 355, BR-14801907 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 42, n. 4, p. 4837-4844, MAR 2016.
• Citações Web of Science: 3

Resumo

Intense photoluminescence (PL) emission was observed in Zr-doped calcium copper titanate powders. The compounds were synthesized by a soft chemical method and heat treated at temperatures between 300 and 850 degrees C. The decomposition of the precursors was examined by X-ray diffraction, Fourier transform infrared, Fourier transform Raman, and ultraviolet-visible spectroscopies; as well as PL analysis. Here, we discuss the role of the structural ordering, which facilitates the self-trapping of electrons and charge transfer, and review the mechanism that triggers the PL. The most intense PL emission was obtained for the sample with 5% Zr calcined at 750 degrees C, which is neither highly disordered nor completely ordered at similar to 520 nm. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved. (AU)

• 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