Improving the angular color uniformity and the lumen output for multi-chip white LED lamps by green Ce0.67Tb0.33MgAl11O19:Ce,Tb phosphor

In this paper, we propose and discuss how to enhance the color uniformity and the lumen output of multi-chip white LED lamps (MCW-LEDs). This can be done by combining the green Ce 0.67 Tb 0.33 MgAl 11 O 19 :Ce,Tb phosphor (CeTb) and phosphor compounding. We find that the proposed method can have a s...

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Bibliographic Details
Published inJournal of the Chinese Institute of Engineers Vol. 39; no. 7; pp. 871 - 875
Main Authors Quoc Anh, Nguyen Doan, Lee, Hsiao-Yi
Format Journal Article
LanguageEnglish
Published Taylor & Francis 02.10.2016
Subjects
0.33
0.67
angular color uniformity
Ce,Tb
lumen output
MgAl
multi-chip white LED lamp
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Summary:In this paper, we propose and discuss how to enhance the color uniformity and the lumen output of multi-chip white LED lamps (MCW-LEDs). This can be done by combining the green Ce 0.67 Tb 0.33 MgAl 11 O 19 :Ce,Tb phosphor (CeTb) and phosphor compounding. We find that the proposed method can have a significant effect on MCW-LEDs performance. Through simulation results, it is confirmed that the color uniformity and the lumen output of MCW-LEDs with average correlated color temperatures of 7000 and 8500 K grow with the concentration of CeTb, while the color rendering ability decreases. With proper choice of CeTb concentration, good performance of MCW-LEDs can be obtained.
ISSN:0253-3839
2158-7299
DOI:10.1080/02533839.2016.1208062