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New yellow Ba_(0.93)Eu_(0.07)Al_(2)O_(4) phosphor for warm-white light-emitting diodes through single-emitting-center conversion

查看全文 作　　者：Xufan [1,2]Li;John D [3]Budai;Feng [1,2]Liu;Jane Y [3]Howe;Jiahua [4]Zhang;Xiao-Jun [5]Wang;Zhanjun [6]Gu;Chengjun [7]Sun;Richard S [2]Meltzer;Zhengwei [1,2]Pan 高影响力作者 机构地区：[1]College of Engineering,University of Georgia,Athens,GA 30602,USA;[2]Department of Physics and Astronomy,University of Georgia,Athens,GA 30602,USA;[3]Materials Science and Technology Division,Oak Ridge National Laboratory,Oak Ridge,TN 37831,USA;[4]State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;[5]Department of Physics,Georgia Southern University,Statesboro,GA 30460,USA;[6]Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;[7]X-ray Science Division,Argonne National Laboratory,Argonne,IL 60439,USA高影响力机构 出　　处：《Light(Science & Applications)》索引2013年第2卷第1期,共8页高影响力期刊 基　　金：ZWP acknowledges funding by the US National Science Foundation(CAREER DMR-0955908);ZJG acknowledges support by the National Basic Research Programs of China(973 program,No.2012CB932504);JDB was supported by the Materials Sciences and Engineering Division,Office of Basic Energy Sciences(BES),US Department of Energy(DOE).;Use of the APS beamline 11-BM-B for synchrotron X-ray powder diffraction;beamline 34-ID-E for polychromatic Laue microdiffraction was supported by the Scientific User Facilities Division of BES,US DOE.;Use of the APS beamline 20-BM-B for X-ray absorption near edge structure measurement by CJS was supported by US DOE under Contract no.DE-AC02-06CH11357 with Argonne National Laboratory.;The TEM characterization was sponsored by Oak Ridge National Laboratory’s Shared Research Equipment(ShaRE)User program,which is sponsored by the Division of Scientific User Facilities of BES,US DOE. 摘　　要：Phosphor-converted white light-emitting diodes for indoor illumination need to be warm-white(i.e.,correlated color temperature,4000 K)with good color rendition(i.e.,color rendering index.80).However,no single-phosphor,single-emitting-center-converted white light-emitting diodes can simultaneously satisfy the color temperature and rendition requirements due to the lack of sufficient red spectral component in the phosphors’emission spectrum.Here,we report a new yellow Ba_(0.93)Eu_(0.07)Al_(2)O_(4) phosphor that has a new orthorhombic lattice structure and exhibits a broad yellow photoluminescence band with sufficient red spectral component.Warm-white emissions with correlated color temperature,4000 K and color rendering index.80 were readily achieved when combining the Ba_(0.93)Eu_(0.07)Al_(2)O_(4) phosphor with a blue light-emitting diode(440–470 nm).This study demonstrates that warm-white light-emitting diodes with high color rendition(i.e.,color rendering index.80)can be achieved based on single-phosphor,single-emitting-center conversion. 关 键 词：LUMINESCENCE single-phosphor-conversion warm-white light-emitting diode yellow phosphor
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