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

Autor: Anicete-Santos, M., Orhan, Emmanuelle, Maurera, M.A.M.A., Simoes, L.G.P., Souza, A.G., Pizani, P.S., Leite, E.R., Varela, J.A., Andres, J., Beltran, A., Longo, E.
Přispěvatelé: UFSCAR, Universidade Federal de São Carlos (UFSCar), LIEC - UNESP, Institute of Chemistry, Axe 3 : organisation structurale multiéchelle des matériaux, Science des Procédés Céramiques et de Traitements de Surface (SPCTS), Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Department de Ciencies Experimentals, Universitat Jaume I
Jazyk: angličtina
Rok vydání: 2007
Předmět:
Zdroj: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2007, 75 (16), pp.165105-1-165105-11. ⟨10.1103/PhysRevB.75.165105⟩
ISSN: 1098-0121
1550-235X
DOI: 10.1103/PhysRevB.75.165105⟩
Popis: International audience; 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.
Databáze: OpenAIRE
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