Enhancement of color quality and luminous flux for remote-phosphor LEDs with red-emitting CaMgSi2O6:Eu2+,Mn2+-Reference-Cited by-同舟云学术

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

Published:2020-09-01 Issue:3 Volume:38 Page:409-415
ISSN:2083-134X
Container-title:Materials Science-Poland
language:en
Short-container-title:

Author:

Luo Guo-Feng¹,Loan Nguyen Thi Phuong²,Van Tho Le³,Anh Nguyen Doan Quoc⁴,Lee Hsiao-Yi¹

Affiliation:

1. Department of Electrical Engineering , National Kaohsiung University of Sciences and Technology , Kaohsiung , Taiwan

2. Faculty of Fundamental 2 , Posts and Telecommunications Institute of Technology , Ho Chi Minh City , Vietnam

3. Institute of Tropical Biology, Vietnam Academy of Science and Technology , Ho Chi Minh City , Vietnam

4. Faculty of Electrical and Electronics Engineering , Ton Duc Thang University , Ho Chi Minh City, Vietnam

Abstract

Abstract SiO2 particles and red-emitting CaMgSi2O6:Eu2+,Mn2+ phosphor have been added into a yellow phosphor compound YAG:Ce3+ 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 CaMgSi2O6:Eu2+,Mn2+ concentration from 2 % to 30 % while maintaining 5 % of the SiO2 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 CaMgSi2O6:Eu2+,Mn2+ and SiO2 addition. The results provided a practical approach to achieve higher luminous efficiency and better color uniformity in remote-phosphor white LEDs (RP-WLEDs).

Publisher

Walter de Gruyter GmbH

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

https://www.sciendo.com/pdf/10.2478/msp-2020-0045

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