Excitation Wavelength Dependent Luminescence of LuNbO4:Pr3+Influences of Intervalence Charge Transfer and Host Sensitization
A series of LuNbO4:Pr3+ phosphors was prepared by a solid-state reaction method at high-temperature. Rietveld refinements were performed based on powder X-ray diffraction (XRD) data. Diffuse reflectance spectra (DRS), UV–vis photoluminescence (PL), time-resolved emission spectra (TRES), and fluoresc...
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Published in | Journal of physical chemistry. C Vol. 120; no. 45; pp. 26044 - 26053 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
American Chemical Society
17.11.2016
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Abstract | A series of LuNbO4:Pr3+ phosphors was prepared by a solid-state reaction method at high-temperature. Rietveld refinements were performed based on powder X-ray diffraction (XRD) data. Diffuse reflectance spectra (DRS), UV–vis photoluminescence (PL), time-resolved emission spectra (TRES), and fluorescence decays were utilized to study the luminescence and host sensitization processes of Pr3+ in LuNbO4. Excitation wavelength dependent luminescence of LuNbO4:Pr3+ was investigated and explained in consideration of the processes of nonradiation relaxation via cross-relaxation, multiphonon relaxation, and crossover to the intervalence charge transfer (IVCT) state. Furthermore, the host sensitization of Pr3+ emission in LuNbO4 was confirmed and the energy transfer efficiency from host to Pr3+ increased with increasing Pr3+ doping concentration/temperature. Because the change of emission intensities for both blue from the host and red from 1D2 is sensitive to temperature, a large variation of emission color is observed between RT and 500 K. |
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AbstractList | A series of LuNbO4:Pr3+ phosphors was prepared by a solid-state reaction method at high-temperature. Rietveld refinements were performed based on powder X-ray diffraction (XRD) data. Diffuse reflectance spectra (DRS), UV–vis photoluminescence (PL), time-resolved emission spectra (TRES), and fluorescence decays were utilized to study the luminescence and host sensitization processes of Pr3+ in LuNbO4. Excitation wavelength dependent luminescence of LuNbO4:Pr3+ was investigated and explained in consideration of the processes of nonradiation relaxation via cross-relaxation, multiphonon relaxation, and crossover to the intervalence charge transfer (IVCT) state. Furthermore, the host sensitization of Pr3+ emission in LuNbO4 was confirmed and the energy transfer efficiency from host to Pr3+ increased with increasing Pr3+ doping concentration/temperature. Because the change of emission intensities for both blue from the host and red from 1D2 is sensitive to temperature, a large variation of emission color is observed between RT and 500 K. |
Author | Zhang, Jianhui Peng, Qi Zhou, Lei Chen, Jun Pan, Fengjuan Shi, Rui Liang, Hongbin Liu, Chunmeng Zhou, Weijie |
AuthorAffiliation | Sun Yat-sen University MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Electronics and Information Technology |
AuthorAffiliation_xml | – name: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, School of Electronics and Information Technology – name: Sun Yat-sen University |
Author_xml | – sequence: 1 givenname: Chunmeng surname: Liu fullname: Liu, Chunmeng – sequence: 2 givenname: Fengjuan surname: Pan fullname: Pan, Fengjuan – sequence: 3 givenname: Qi surname: Peng fullname: Peng, Qi – sequence: 4 givenname: Weijie surname: Zhou fullname: Zhou, Weijie – sequence: 5 givenname: Rui surname: Shi fullname: Shi, Rui – sequence: 6 givenname: Lei surname: Zhou fullname: Zhou, Lei – sequence: 7 givenname: Jianhui surname: Zhang fullname: Zhang, Jianhui – sequence: 8 givenname: Jun surname: Chen fullname: Chen, Jun – sequence: 9 givenname: Hongbin surname: Liang fullname: Liang, Hongbin email: cesbin@mail.sysu.edu.cn |
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DOI | 10.1021/acs.jpcc.6b09806 |
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Snippet | A series of LuNbO4:Pr3+ phosphors was prepared by a solid-state reaction method at high-temperature. Rietveld refinements were performed based on powder X-ray... |
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Title | Excitation Wavelength Dependent Luminescence of LuNbO4:Pr3+Influences of Intervalence Charge Transfer and Host Sensitization |
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