New yellow Ba0.93Eu0.07Al2O4 phosphor for warm-white light-emitting diodes through single-emitting-center conversion

被引：0
作者：
Xufan Li
John D Budai
Feng Liu
Jane Y Howe
Jiahua Zhang
Xiao-Jun Wang
Zhanjun Gu
Chengjun Sun
Richard S Meltzer
Zhengwei Pan
机构：
[1] College of Engineering,Department of Physics and Astronomy
[2] University of Georgia,Materials Science and Technology Division
[3] Athens,Department of Physics
[4] GA 30602,X
[5] USA,ray Science Division
[6] University of Georgia,undefined
[7] Athens,undefined
[8] GA 30602,undefined
[9] USA,undefined
[10] Oak Ridge National Laboratory,undefined
[11] Oak Ridge,undefined
[12] TN 37831,undefined
[13] USA,undefined
[14] State Key Laboratory of Luminescence and Applications,undefined
[15] Changchun Institute of Optics,undefined
[16] Fine Mechanics and Physics,undefined
[17] Chinese Academy of Sciences,undefined
[18] Changchun 130033,undefined
[19] China,undefined
[20] Georgia Southern University,undefined
[21] Statesboro,undefined
[22] GA 30460,undefined
[23] USA,undefined
[24] Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,undefined
[25] Institute of High Energy Physics,undefined
[26] Chinese Academy of Sciences,undefined
[27] Beijing 100049,undefined
[28] China,undefined
[29] Argonne National Laboratory,undefined
[30] Argonne,undefined
[31] IL 60439,undefined
[32] USA,undefined
来源：
Light: Science & Applications | 2013年 / 2卷
关键词：
luminescence; single-phosphor-conversion; warm-white light-emitting diode; yellow phosphor;
D O I：
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中图分类号：
学科分类号：
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 Ba0.93Eu0.07Al2O4 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 Ba0.93Eu0.07Al2O4 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.
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页码：e50 / e50
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