Effects of Cr doping on the optical characteristics of PbWO4 crystals

Liu, Weifeng; Feng, Xiqi; Huang, Yidong; Luo, Zundu; Zhu, Wenliang

doi:10.1016/j.jlumin.2004.09.112

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…One should remember the necessity of the charge compensation in the crystal lattice. Therefore, some authors consider that the second type of RE centers in the PWO crystals could arise whether the impurity RE ions occupy W positions [10,11,[41][42][43][44][45]. Such replacement is accompanied by comparable large differences of charges and ionic radii.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the creation of bonded impurity centers was considered. Those centers combine the RE ion in a Pb site, the RE ion in a W site, and oxygen vacancy: [43][44][45]. In both cases, the RE 3+ V(W) replacement leads to the charge compensation of some oxygen vacancies, that changes the composition of the matrix emission LCs ensemble related to oxygen vacancies.…”

Section: Introductionmentioning

confidence: 99%

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Structure of Centers of Matrix Emission of the Undoped and RE-Doped Scheelite-Type Lead Tungstate Crystals

Chukova

Nedilko

2019

Ukr. J. Phys.

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The paper reports the investigation of a structure of luminescence spectra of PbWO4 (PWO) crystals. The doping of the samples with rare earth (RE) impurities is used in order to obtain more information about the composition of spectra of the PWO matrix emission and the structure of its luminescence centers. The decomposition of the emission spectra onto individual bands has shown that 5 bands contribute to the total spectra of all the undoped and RE-doped samples at 10 K. The maxima of the obtained bands are 1.95, 2.2, 2.45, 2.7, and 3.0 eV. Effects of the RE-doping and the annealing on relative intensities of these bands are considered. The nature of luminescence and the structure of the centers involved in the excitation and emission processes responsible for each of the separated bands are discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure of Centers of Matrix Emission of the Undoped and RE-Doped Scheelite-Type Lead Tungstate Crystals

Chukova

Nedilko

2019

Ukr. J. Phys.

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Study on the photoluminescence of Cr³⁺ and doping mechanism in F^– codoped PbWO₄ single crystal

Li¹,

Long

Feng

et al. 2009

Physica Status Solidi (a)

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The influence of Cr3+ and F– codoping on the defect structures in PbWO4 crystal is investigated by X‐ray diffraction and Fourier transform infrared (FTIR) spectroscopy and consequently a doping mechanism is proposed that the Cr3+ ions predominantly occupy the W6+ sites due to the help of F–. Photoluminescence (PL) spectra of PWO:Cr,F demonstrates in addition to the intrinsic luminescence from the PbWO4 crystal, a new sharp emission band at 15500 cm–1 can be observed even at room temperature and it may originate from the spin‐forbidden 2E → 4A2 radiation of Cr3+ in a strong crystal field. It suggests that the F– codoping makes a large contribution to the 2E → 4A2 luminescence of Cr3+ in the scheelite‐structural PWO single crystal. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Controlled synthesis of semiconductor PbWO4 nanocrystals inside silica SBA-15 materials

Zhao

Shen

Wang

et al. 2011

Advanced Powder Technology

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Effects of Cr doping on the optical characteristics of PbWO4 crystals

Cited by 4 publications

References 22 publications

Structure of Centers of Matrix Emission of the Undoped and RE-Doped Scheelite-Type Lead Tungstate Crystals

Structure of Centers of Matrix Emission of the Undoped and RE-Doped Scheelite-Type Lead Tungstate Crystals

Study on the photoluminescence of Cr³⁺ and doping mechanism in F^– codoped PbWO₄ single crystal

Controlled synthesis of semiconductor PbWO4 nanocrystals inside silica SBA-15 materials

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Effects of Cr doping on the optical characteristics of PbWO4 crystals

Cited by 4 publications

References 22 publications

Structure of Centers of Matrix Emission of the Undoped and RE-Doped Scheelite-Type Lead Tungstate Crystals

Structure of Centers of Matrix Emission of the Undoped and RE-Doped Scheelite-Type Lead Tungstate Crystals

Study on the photoluminescence of Cr3+ and doping mechanism in F– codoped PbWO4 single crystal

Controlled synthesis of semiconductor PbWO4 nanocrystals inside silica SBA-15 materials

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Product

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Study on the photoluminescence of Cr³⁺ and doping mechanism in F^– codoped PbWO₄ single crystal