Improved ternary-composite-ceramic phosphors for warm-white laser lighting

Hisashi Minemoto; Kana Fujioka; Hiroshi Fuji; Kazuhisa Yamamoto; Tsuneo Kusunoki; Seika Tokumitsu; Hideo Kawabe

doi:10.1117/12.3033309

31 December 2024 Improved ternary-composite-ceramic phosphors for warm-white laser lighting

Hisashi Minemoto, Kana Fujioka, Hiroshi Fuji, Kazuhisa Yamamoto, Tsuneo Kusunoki, Seika Tokumitsu, Hideo Kawabe

Author Affiliations +

Proceedings Volume 13487, Optics and Photonics International Congress 2024; 134870D (2024) https://doi.org/10.1117/12.3033309
Event: Optics and Photonics International Congress, 2024, Yokohama, Japan

Abstract

We propose improved ternary-composite-ceramic phosphors for warm-white laser lighting. The ceramic phosphors utilize a red phosphor; (Ba,Sr)₂Si₅N₈:Eu, a yellow phosphor; YAG:Ce, and a thermal conducting matrix. Two types of composite ceramics, Type A is more power-efficient and Type B is effective for more warm light. These composite ceramics have higher saturation input laser power than that of our previous one, in which Sr₂Si₅N₈ is used as for a red phosphor. These improved ceramic phosphors do not show saturation at least 4W pumping laser power, but our previous one does a tendency of saturation at this power. The improved ternary-composite-ceramic phosphors is very useful for warm white laser lighting.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Hisashi Minemoto, Kana Fujioka, Hiroshi Fuji, Kazuhisa Yamamoto, Tsuneo Kusunoki, Seika Tokumitsu, and Hideo Kawabe "Improved ternary-composite-ceramic phosphors for warm-white laser lighting", Proc. SPIE 13487, Optics and Photonics International Congress 2024, 134870D (31 December 2024); https://doi.org/10.1117/12.3033309

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