Enhancement of color quality and luminous flux for remote-phosphor LEDs with red-emitting CaMgSi2O6:Eu2+,Mn2

SiO particles and red-emitting CaMgSi :Eu ,Mn phosphor have been added into a yellow phosphor compound YAG:Ce to enhance the optical efficiency of white light LEDs whose average correlated color temperature (CCT) is in the range of 5600 K ÷ 8500 K. It was observed that altering CaMgSi :Eu ,Mn concen...

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Bibliographic Details
Published in:Materials science--Poland 2020-09, Vol.38 (3), p.409-415
Main Authors: Luo, Guo-Feng, Loan, Nguyen Thi Phuong, Van Tho, Le, Anh, Nguyen Doan Quoc, Lee, Hsiao-Yi
Format: Article
Language:English
Subjects:
CaMgSi
color quality scale
Eu
Mie-scattering theory
remote-phosphor white LEDs
SiO
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Summary:SiO particles and red-emitting CaMgSi :Eu ,Mn phosphor have been added into a yellow phosphor compound YAG:Ce to enhance the optical efficiency of white light LEDs whose average correlated color temperature (CCT) is in the range of 5600 K ÷ 8500 K. It was observed that altering CaMgSi :Eu ,Mn concentration from 2 % to 30 % while maintaining 5 % of the SiO strongly influenced the color rendering index (CRI), color quality scale (CQS), and lumen efficiency of the compound. Besides, through the application of Monte Carlo simulation and Mie-scattering theory, it was possible to improve the optical properties by CaMgSi :Eu ,Mn and SiO addition. The results provided a practical approach to achieve higher luminous efficiency and better color uniformity in remote-phosphor white LEDs (RP-WLEDs).
ISSN:2083-134X
DOI:10.2478/msp-2020-0045