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Luminescence and energy transfer in Eu(2+) and Mn(2+) co-doped Ca(2)P(2)O(7) for white light-emitting diodes
Alternative Title论文其他题名
Hao Z. D.; Nie Z. G.; Ye S.; Zhong R. X.; Zhang X.; Chen L.; Ren X. G.; Lu S. Z.; Wang X. J.; Zhang J. H.
2008
Source PublicationJournal of the Electrochemical Society
ISSN0013-4651
Volume155Issue:8Pages:H606-H610
AbstractEu(2+) and Mn(2+) co-doped alpha- and beta-Ca(2)P(2)O(7) are prepared by solid-state reaction. An orange emission band originating from the (4)T(1)((4)G)-(6)A(1)((6)S) transition of Mn(2+) is observed in both phases upon UV excitation through energy transfer from Eu(2+) to Mn(2+). Photoluminescence and energy transfer in alpha-Ca(2)P(2)O(7):Eu(2+), Mn(2+) are investigated as a function of Mn(2+) concentrations. The energy transfer rates are calculated based on the analysis of the luminescence dynamical process as well as fluorescence lifetime measurements. The intensity ratios of the orange to blue band as a function of Mn(2+) concentrations are also calculated and the results are in good agreement with that obtained directly from emission spectra. A white light emitting diode (LED) fabricated through the integration of a GaN near-UV chip and two phosphor blends (alpha-Ca(2)P(2)O(7):Eu(2+), Mn(2+) blue-orange phosphor and Ba(2)SiO(4):Eu(2+) green phosphor) into a single package shows a warm white light of 3797 K correlated color temperature, a good color rendering index (CRI) of 84, and a luminescent efficiency of 11 lm/W with color coordinates of x=0.39, y=0.40. Moreover, the CRI can be improved to 94 by using blue Ca(2)(PO4)(3)Cl:Eu(2+) phosphor added to the two phosphor blends. (C) 2008 The Electrochemical Society.
Indexed BySCI ; EI
Language英语
Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/26471
Collection中科院长春光机所知识产出
Recommended Citation
GB/T 7714
Hao Z. D.,Nie Z. G.,Ye S.,et al. Luminescence and energy transfer in Eu(2+) and Mn(2+) co-doped Ca(2)P(2)O(7) for white light-emitting diodes[J]. Journal of the Electrochemical Society,2008,155(8):H606-H610.
APA Hao Z. D..,Nie Z. G..,Ye S..,Zhong R. X..,Zhang X..,...&Zhang J. H..(2008).Luminescence and energy transfer in Eu(2+) and Mn(2+) co-doped Ca(2)P(2)O(7) for white light-emitting diodes.Journal of the Electrochemical Society,155(8),H606-H610.
MLA Hao Z. D.,et al."Luminescence and energy transfer in Eu(2+) and Mn(2+) co-doped Ca(2)P(2)O(7) for white light-emitting diodes".Journal of the Electrochemical Society 155.8(2008):H606-H610.
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