Contribution of structural order-disorder to the green photoluminescence of PbWO4

被引：44

作者：

Anicete-Santos, M.

Orhan, E.

de Maurera, M. A. M. A.

Simoes, L. G. P.

Souza, A. G.

Pizani, P. S.

Leite, E. R.

Varela, J. A.

Andres, Juan

Beltran, A.

Longo, E.

机构：

[1] Univ Fed Sao Carlos, Dept Chem, LIEC, BR-13565905 Sao Carlos, SP, Brazil

[2] Univ Jaume 1, Dept Ciencies Expt, Castellon de La Plana, Spain

[3] Univ Limoges, Fac Sci & Tech, UMR CNRS 6638, F-87060 Limoges, France

[4] Univ Fed Paraiba, Dept Chem, BR-58059900 Joao Pessoa, Paraiba, Brazil

[5] Univ Fed Sao Carlos, Dept Phys, BR-13565905 Sao Carlos, SP, Brazil

[6] UNESP, Inst Chem, LIEC, BR-14801907 Araraquara, SP, Brazil

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.75.165105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An intense and broad visible photoluminescence (PL) band was observed at room temperature in structurally disordered PbWO4 thin films. The scheelite lead tungstate (PbWO4) films prepared by the polymeric precursor method and annealed at different temperatures were structurally characterized by means of x-ray diffraction and atomic force microscopy analysis. Quantum-mechanical calculations showed that the local disorder of the network modifier (Pb) has a very important role in the charge transfer involved in the green PL emission. The experimental and theoretical results are in good agreement, both indicating that the generation of the intense visible PL band is related to simultaneous structural order and disorder in the scheelite PbWO4 lattice.

引用

页数：11

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