Otro
Photoluminescence in quasi-amorphous Pb0.8X0.2Zr0.53Ti0.47O3 (X = Ca, Sr and Ba) powders: An optical and structural study
Registro en:
Chemical Physics Letters. Amsterdam: Elsevier B.V., v. 475, n. 1-3, p. 96-100, 2009.
0009-2614
10.1016/j.cplett.2009.05.026
WOS:000266673600020
Autor
Longo, V. M.
Silva, M. S.
de Figueiredo, A. T.
Franco, R. W. A.
Vila, C.
Cilense, M.
Varela, José Arana
Longo, Elson
Andres, J.
Resumen
Crystalline and quasi-amorphous PZT and PZT:X (X = Ca, Sr and Ba) powders were obtained by the polymeric precursor method. Electron paramagnetic resonance (EPR) and photoluminescence (PL) data suggest that the presence of order-disorder within the lattice network, i.e., the appearance of symmetry-breaking processes that give rise to non-ideal octahedra and networks of dodecahedral clusters, is an essential factor for the occurrence of PL. Measurements of PL indicate that the shallow defects in the band gap enhance blue light emission. (c) 2009 Elsevier B.V. All rights reserved. Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)