Conditions giving rise to intense visible room temperature photoluminescence in SrWO4 thin films: the role of disorder

Orhan, Emmanuelle; Anicete-Santos, M.; Maurera, M. A. M. A.; Pontes, F. M.; Paiva-Santos, C. O.; Souza, A. G.; Varela, José Arana; Pizani, P. S.; Longo, Elson

doi:10.1016/j.chemphys.2004.11.013

Cited by 62 publications

(41 citation statements)

References 31 publications

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“…We are focusing on the effect of periodic local structural deformation among the numerous possible irregularities. This strategy of models with the coexistence of different types of environments around the network former has already been successfully employed in studying the PL emission in orderdisordered structures of scheelite tungstates [51][52][53] and of perovskite titanates. [54][55][56][57][58][59] In the case of the perovskite titanates, the cationic environments had fivefold MO 5 ͑M =Ti,Zr͒ and sixfold MO 6 coordinations.…”

Section: Crystal Structure and Periodic Modelsmentioning

confidence: 99%

Contribution of structural order-disorder to the green photoluminescence ofPbWO4

et al. 2007

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An intense and broad visible photoluminescence ͑PL͒ band was observed at room temperature in structurally disordered PbWO 4 thin films. The scheelite lead tungstate ͑PbWO 4 ͒ 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 ͑Pb͒ 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 PbWO 4 lattice.

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Section: Crystal Structure and Periodic Modelsmentioning

confidence: 99%

Contribution of structural order-disorder to the green photoluminescence ofPbWO4

et al. 2007

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“…Several authors reported structural disorder and quantum mechanics calculation 17,18 using periodic calculations DFT/ B3LYP to relate the structural disorder of titanate to room temperature PL properties. The applied methodology is based on atomic displacement to study the charge transfer between ͓TiO 5 -TiO 6 ͔ clusters and electronic levels inside the band gap.…”

Section: Introductionmentioning

confidence: 99%

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

Milanez¹,

Figueiredo²,

Lázaro³

et al. 2009

Journal of Applied Physics

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In this paper, electron paramagnetic resonance, photoluminescence ͑PL͒ emission, and quantum mechanical calculations were used to observe and understand the structural order-disorder of CaTiO 3 , paying special attention to the role of oxygen vacancy. The PL phenomenon at room temperature of CaTiO 3 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 CaTiO 3 was obtained by the polymeric precursor method.

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“…polymeric precursor and adjustable galvanic cell) by pulsed-laser deposition method [28], or by a spray pyrolysis method [29]. Figure 4 shows the scanning electron microscope (SEM) images with oxidant for 60 h and without oxidant for 80 h. The chemical solution method has been proved to be an inexpensive and environmentally friendly route for the preparation of strontium tungstate film.…”

Section: Filmmentioning

confidence: 99%

“…Strontium tungstate film can be prepared by a chemical solution method [24][25][26][27][28][29][30] (e.g. polymeric precursor and adjustable galvanic cell) by pulsed-laser deposition method [28], or by a spray pyrolysis method [29].…”

Section: Filmmentioning

confidence: 99%

Recent advances in strontium tungstate scheelite material

Wang

Jia

2009

Front. Chem. China

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Strontium tungstate is a well-known stimulated Raman scattering laser material. The unique structure of this crystal allows the usage of these crystals as matrices for laser active elements with nonlinear self-conversion of radiation to a new spectral range. The recent advances in crystal growth, particle and thin film fabrication, spectroscopy, and laser properties were reviewed. The demonstration of laser output of neat and Nd 3+ -doped SrWO 4 crystal shows that it is an efficient self-stimulated Raman scattering laser.

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Conditions giving rise to intense visible room temperature photoluminescence in SrWO4 thin films: the role of disorder

Cited by 62 publications

References 31 publications

Contribution of structural order-disorder to the green photoluminescence ofPbWO4

Contribution of structural order-disorder to the green photoluminescence ofPbWO4

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

Recent advances in strontium tungstate scheelite material

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