CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Influence of Al3+ doping on the energy levels and thermal property of the 3.5MgO·0.5MgF2·GeO2:Mn4+ red-emitting phosphor |
Yuan Lin-lin (苑琳琳), Zhang Xiao-Song (张晓松), Xu Jian-Ping (徐建萍), Sun Jian (孙健), Jin Han (金含), Liu Xiao-Juan (刘晓娟), Li Lin-Lin (李霖霖), Li Lan (李岚) |
Institute of Material Physics, Key Laboratory for Optoelectronic Materials and Devices of Tianjin, Key Laboratory of Display Materials and Photoelectric Devices of Ministry of Education, Tianjin University of Technology, Tianjin 300384, China |
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Abstract A series of Al3+-doped 3.5MgO·0.5MgF2·GeO2:Mn4+ red-emitting phosphors is synthesized by high temperature solid-state reaction. The broad excitation band at 300 nm-380 nm, resulting from the 4A2 → 4T1 transition of Mn4+, exhibits a blue shift with the increase of Al2O3 content. The observation of the decreased Mn4+-O2- distance is explained by the crystal field theory. The temperature-dependent photoluminescence spectra with various amounts of Al2O3 content are comparatively measured and the calculation shows that the activation energy increases up to 0.41 eV at the Al2O3 content of 0.1 mol. The maximum phonon densities of state for these samples are calculated from Raman spectra and they are correlated with the thermal properties.
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Received: 21 January 2015
Revised: 19 March 2015
Accepted manuscript online:
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PACS:
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78.55.-m
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(Photoluminescence, properties and materials)
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33.50.-j
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(Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion))
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65.40.-b
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(Thermal properties of crystalline solids)
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Fund: Project supported by the National High Technology Research and Development Program of China (Grant No. 2013AA014201), the Natural Science Foundation of Tianjin City, China (Grant Nos. 11JCYBJC00300 and 14JCZDJC31200), and the National Key Foundation for Exploring Scientific Instrument of China (Grant No. 2014YQ120351). |
Corresponding Authors:
Li Lan
E-mail: lilan@tjut.edu.cn
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Cite this article:
Yuan Lin-lin (苑琳琳), Zhang Xiao-Song (张晓松), Xu Jian-Ping (徐建萍), Sun Jian (孙健), Jin Han (金含), Liu Xiao-Juan (刘晓娟), Li Lin-Lin (李霖霖), Li Lan (李岚) Influence of Al3+ doping on the energy levels and thermal property of the 3.5MgO·0.5MgF2·GeO2:Mn4+ red-emitting phosphor 2015 Chin. Phys. B 24 087802
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