α-SrO·3B2O3:Sm2+ and SiO2: A novel application for improving color rendering index and luminous flux of remote phosphor white LEDs

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Author

  • Anh Q. D. Nguyen, Thuong T. Nguyen, Thu H. T. Vu, Le X. Phan

Từ khóa:

YAG
Ce
α-SrO·3B2O3:Sm2
SiO2
Color rendering index
Luminous efficiency

Tóm tắt

This paper presents a novel application of SrO·3B2O3:Sm2+ and SiO2 compound for improving the color rendering index (CRI) and the luminous efficacy (LE) of white LEDs. 2%-30% α-SrO·3B2O3:Sm2+ and 5% SiO2 is added to the remote-phosphor layer in LightTools simulations. The obtained results indicated that LE increases with low α-SrO·3B2O3:Sm2+ concentration. If more than 18% α-SrO·3B2O3:Sm2+ are employed, then the LE tends to be reduced. In addition, the red component of remote-phosphor layer should be enhanced with the increasing of α-SrO·3B2O3:Sm2+, which results in higher CRI values. The above results is explained by Mie-scattering theory, i.e., through the computation of scattering parameters of α-SrO·3B2O3:Sm2+, including scattering coefficient and anisotropy scattering value.

Tài liệu tham khảo

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Jun 30, 2017
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Anh Q. D. Nguyen, Thuong T. Nguyen, Thu H. T. Vu, Le X. Phan. “α-SrO·3B2O3:Sm2+ and SiO2: A Novel Application for Improving Color Rendering Index and Luminous Flux of Remote Phosphor White LEDs”. Tạp Chí Khoa học Và Công nghệ - Đại học Đà Nẵng, vol 6, số p.h 115, Tháng Sáu 2017, tr 1-3, https://jst-ud.vn/jst-ud/article/view/2532.

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