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Exellent color quality and luminous flux of wleds using triple-layer remote phosphor configuration

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This study proposed a triple-layer remote phosphor (TRP) structure to improve the color and luminous ux of white LEDs (WLEDs). TRP structure consists of 3 di erent phosphor layers: yellow YAG:Ce3+ layer below, red CaMgSi2O6:Eu2+,Mn2+ phosphor on top and green layer Ba2Li2Si2O7:Sn2+,Mn2+ phosphor in the middle. | VOLUME 4 ISSUE 1 2020 March Exellent Color Quality and Luminous Flux of Wleds Using Triple-Layer Remote Phosphor Configuration 1 1 2 Min-Feng LAI Hsiao-Yi LEE Doan Quoc Anh NGUYEN Department of Electrical Engineering National Kaohsiung University of Science and 1 Technology Kaohsiung Taiwan 2 Power System Optimization Research Group Faculty of Electrical and Electronics Engineering Ton Duc Thang University Ho Chi Minh City Vietnam Corresponding Author NGUYEN Doan Quoc Anh Email nguyendoanquocanh@tdtu.edu.vn Received 21-Aug-2019 accepted 12-Dec-2020 published 31-Mar-2020 DOI http dx.doi.org 10.25073 jaec.202041.255 ment in the concentration range of 10 -14 CaMgSi2 O6 Eu2 Mn2 regardless of Abstract. This study proposed a triple-layer Ba2 Li2 Si2 O7 Sn2 Mn2 concentration. LE in remote phosphor TRP structure to improve particular can also increase by more than 40 the color and luminous ux of white LEDs along with the improvement of CRI and CQS WLEDs . TRP structure consists of 3 di erent due to the reduction of the backscattered light phosphor layers yellow YAG Ce3 layer below and the addition of green light. Research results red CaMgSi2 O6 Eu2 Mn2 phosphor on top are a valuable reference for producers who wish and green layer Ba2 Li2 Si2 O7 Sn2 Mn2 to improve the color quality and enhance the phosphor in the middle. Using red luminous ux of WLEDs. CaMgSi2 O6 Eu2 Mn2 to control the red light component leads to the increase in color rendering index CRI . Utilizing the Keywords green CaMgSi2 O6 Eu2 Mn2 phosphor to control the green light component results in WLEDs triple-layer structure remote the increase in luminous e cacy LE of phosphor package color quality luminous WLEDs. Furthermore when the concentra- ux. tion of these two phosphors increased yellow layer YAG Ce3 concentration decreased to maintain average correlated color tempera- tures ACCTs in the range from 6000K to 1. Introduction 8500K. Besides CRI and LE color quality scale CQS is also analyzed through the