Ca7 Si2 P2 O16 :Eu2+ green phosphor for optic enhancement of the WLEDs dual-layer remote structure
Van Liem Bui, Guo Feng Luo, Tam Nguyen Kieu
Abstract
To enhance the dual-layer remote phosphorus configuration’s color standard help spread its application in the LED devices, the new green-emitting phosphor of Ca7 Si2 P2 O16 :Eu2+ is proposed. The sol-gel method is used to dope the Eu2+ ions with Ca7 Si2 P2 O16 . Increasing the ion Eu2+ concentration can lead to high thermal stability, color-tunable ability, stronger green emission band, and higher photoluminescence extraction. The dual-layer structure’s color standards, as well as the luminous flux, are examined with different concentrations of Ca7 Si2 P2 O16: Eu2+ in the phosphor layer. Owing to the improved features, the green phosphor Ca7 Si2 P2 O16 :Eu2+ has enhanced the emission intensity in the blue and green wavelengths, resulting in better color mixing and distribution. The luminescence shows the enhancement when increasing the concentration of Ca7 Si2 P2 O16 :Eu2+ . However, the color rendering feature can present a reduction with more than 10% wt. green phosphor within the double-layer phosphorus remote configuration, due to color balance’s loss.
Keywords
Ca7Si2P2O16:Eu2+; Color homogeneity; Luminous flux; Monte Carlo method; WLEDs
DOI:
https://doi.org/10.11591/eei.v11i4.4066
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Bulletin of EEI Stats
Bulletin of Electrical Engineering and Informatics (BEEI) ISSN: 2089-3191 , e-ISSN: 2302-9285 This journal is published by the Institute of Advanced Engineering and Science (IAES) in collaboration with Intelektual Pustaka Media Utama (IPMU) .