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国家自然科学基金(20071207)

作品数:3 被引量:1H指数:1
发文基金:天津市自然科学基金国家自然科学基金国家重点基础研究发展计划更多>>
相关领域:理学一般工业技术更多>>

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Infrared Luminescent Properties of a Pr-Doped KBr Submicron Rod
2011年
KBr:Pr with a submicron rod structure is successfully synthesized by a solid-state reaction using absolute alcohol as the abrasive.X-ray diffraction,scanning electron microscopy,photoluminescence spectra and fluorescence decay curves are used to characterize the resulting materials.The influences of Pr^(3+)dopant concentration on the luminescence and lifetime are discussed.Furthermore,luminescent measurements show that KBr:Pr has a high emission intensity compared with other Pr-doped matrixes,which is related to the low phonon energy of KBr.The results suggest that the phonon energy of the host is important in determining the luminescent efficiency.
WEI Feng-WeiZHANG Xiao-SongLI LanXU Jian-PingZHOU Yong-LiangLIU Pei
关键词:KBRLIFETIME
The influence of cation additives on the NIR luminescence intensity of Er^(3+)-doped borate glasses被引量:1
2012年
Er3+-doped 25BaO-(25-x)SiO2-xAl2O3-25B2O3 transparent glasses are prepared with x = 0,12.5 and 25 by a solid-state reaction.The Er-related NIR luminescence intensity,which corresponds to the transition of 4I15/2-4I13/2,is obviously altered with different silicon/aluminum ratios.The Judd-Ofelt parameters of the Er3+ ions are adopted to explain the intensity change in the NIR fluorescence,and the Raman scattering intensity versus the amount of Al and/or Si components are discussed.The spectra of the three samples are quite similar in the peak positions,but different in intensity.The maximal phonon density of state for the samples is calculated from the Raman spectra and is correlated to the NIR luminescence efficiency.
周永亮张晓松徐建萍张忠朋张高峰魏凤巍李岚
全文增补中
Simulation of temperature induced colorimetric shift of YAG:Ce0.06,Gdx phosphor
YAG:Ce0.06,Gdx phosphors were prepared by solid-state method, and temperature dependence of chromaticity coord...
Ting JiXiaosong ZhangQun Xi
关键词:PHOTOLUMINESCENCE
Influence of Si^(4+) substitution on the temperature-dependent characteristics of Y_3Al_5O_(12):Ce
2011年
A series of aAl5O12:Ce (YAG:Ce) phosphors doped with different Si4+ concentrations is prepared by solid-state reaction. The temperature dependent characteristics of luminescent spectrum and decay time of Ce3+ are investigated. With Si4+ doped, the emission spectrum shows a blue shift clue to a decrease of the splitting of 5d levels of Ce3+ ion. The thermal stability is greatly improved by adding Si4+ because the activation energy AE increases from 0.1836 eV to 0.2401 eV. The study of the decay times against temperature for various doping concentrations of Si4+ shows that the calculated nonradiative decay rate is affected by Si4+ substitution. The results are explained by the configurational coordinate diagram.
徐生艳张晓松周永亮奚群李岚
关键词:PHOSPHORLUMINESCENCE
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