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

• Autorzy: Luo Guo-Feng , Loan Nguyen Thi Phuong , Tho Van Le , Anh Nguyen Doan Quoc , Lee Hsiao-Yi

Identyfikatory

DOI

10.2478/msp-2020-0045

• Języki publikacji: EN

Abstrakty

EN

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).

Słowa kluczowe

EN

remote-phosphor white LEDs; SiO2; CaMgSi2O6:EU2+; Mn2+; color quality scale; Mie-scattering theory

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2020
• Tom: Vol. 38, No. 3
• Strony: 409--415
• Opis fizyczny: Bibliogr. 24 poz., rys., tab.

Twórcy

autor

Luo Guo-Feng

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

autor

Loan Nguyen Thi Phuong

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

autor

Tho Van Le

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

autor

Anh Nguyen Doan Quoc

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

autor

Lee Hsiao-Yi

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

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