The role of oxygen vacancy in the photoluminescence property at room temperature of the CaTiO3

Autor(es)

Milanez, Juliana ^[1] ; de Figueiredo, Alberthmeiry T. ^[2] ; de Lazaro, Sergio ^[3] ; Longo, Valeria M. ^[2] ; Erlo, Rafael ^[1] ; Mastelaro, Valmor R. ^[4] ; Franco, Roberto W. A. ^[5] ; Longo, Elson ^[2] ; Varela, Jose A. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Quim, Lab Interdisciplinar Eletroquim & Ceram, BR-13565905 Sao Paulo - Brazil

^[2] Univ Estadual Paulista, Inst Quim, Lab Interdisciplinar Eletroquim & Ceram, BR-14801970 Sao Paulo - Brazil

^[3] Univ Estadual Ponta Grossa, Dept Quim, BR-84030900 Ponta Grossa, Parana - Brazil

^[4] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Paulo - Brazil

^[5] Univ Estadual Norte Fluminesce, Ctr Ciencia & Tecnol, BR-28013602 Rio De Janeiro - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Physics; v. 106, n. 4 AUG 15 2009.
• Citações Web of Science: 23

Resumo

In this paper, electron paramagnetic resonance, photoluminescence (PL) emission, and quantum mechanical calculations were used to observe and understand the structural order-disorder of CaTiO3, paying special attention to the role of oxygen vacancy. The PL phenomenon at room temperature of CaTiO3 is directly influenced by the presence of oxygen vacancies that yield structural order-disorder. These oxygen vacancies bonded at Ti and/or Ca induce new electronic states inside the band gap. Ordered and disordered CaTiO3 was obtained by the polymeric precursor method. (C) 2009 American Institute of Physics. {[}DOI: 10.1063/1.3190524] (AU)

• Processo FAPESP: 98/14324-0 - Multidisciplinary Center for Development of Ceramic Materials
• Beneficiário: Elson Longo da Silva
• Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs