外文题目: Electroluminescent Properties of WLEDs With the Structures of Ce:YAG Single Crystal/Blue Chip and Sr2Si5N8:Eu2+/Ce:YAG Single Crystal/Blue Chip
作者: Du, Yong; Shao, Chongyun; Dong, Yongjun; Yang, Qiuhong
刊名: J. Disp. Technol.
年: 2016 卷: 12 期: 4 页： 323--327
英文关键词:
Electroluminescent; phosphor; WLED
LIGHT-EMITTING-DIODES; WHITE-LIGHT; PHOSPHORS; CE
英文摘要:
In this work, evidence for matching blue chips with Ce:YAG single crystal phosphor is given. Forward current (I-f) and red phosphor were investigated and discussed to improve the electroluminescent properties of WLEDs using Ce: YAG single-crystal phosphors. Optimum forward current of such a device is chosen at above 45 mA. The structure of Sr2Si5N8:Eu2+ phosphor/Ce:YAG single crystal/blue chip enormously improved the color temperature and color rendering index. This method can be a solution to achieve warm white light. The chromaticity of this structure with the color temperature of 5629 K and color rendering index of 77.1 is (CIE x, CIE y) = (0.3296, 0.3369) is closely meeting the demand for ideal white light for general lighting (0.33, 0.33), but the luminous efficiency (eta(L)) is lower at 81.04 lm/W in comparison to that of the Ce:YAG single crystal/blue chip structure at 94.55 lm/W.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1109/JDT.2015.2480803


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