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- W2801804321 abstract "This paper investigates a method to improve the lighting performance of white light-emitting diodes (WLEDs), which are packaged using two separate remote phosphor layers, a yellow-emitting YAG:Ce phosphor layer and a red-emitting α-SrO·3B2O3:Sm2+ phosphor layer. The thicknesses of these two layers are 800 μm and 200 μm, respectively. Both of them are examined in conditions where the average correlated color temperatures (CCT) are 7700 K and 8500 K. For this two-layer model, the concentration of red phosphor is varied from 2% to 30% in the upper layer, while in the lower layer the yellow phosphor concentration is kept at 15%. It was found interestingly that the lighting properties such as color rendering index (CRI) and luminous flux are enhanced significantly, while the color uniformity is maintained in a relatively close range to the one of one-layer configuration (measured at the same correlated color temperature). Besides, the transmitted and reflected light of each phosphor layer are revised by combining Kubelka-Munk and Mie-Lorenz theories. Through analysis, it is demonstrated that the packaging configuration of two-layer remote phosphor that employs red-emitting α-SrO·3B2O3:Sm2+ phosphor particles provides a practical solution for general WLEDs lighting." @default.
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- W2801804321 date "2017-08-25" @default.
- W2801804321 modified "2023-09-27" @default.
- W2801804321 title "Red-emitting α-SrO·3B 2 O 3 :Sm 2+ Phosphor for WLED Lamps: Novel Lighting Properties with Two-layer Remote Phosphor Package" @default.
- W2801804321 doi "https://doi.org/10.3807/copp.2017.1.4.389" @default.
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