Composition and luminescence properties of highly robust green-emitting LuAG:Ce/Al 2O 3 composite phosphor ceramics for high-power solid-state lighting

• DOI: 10.26599/jac.2023.9220710
• Publication Date: 2023-02-14T09:26:38Z
• Authors: Ziqiu Cheng; Xin Liu; Xinrong Chen; Jian Xu; Yanbin Wang; Tengfei Xie; Lexiang Wu; Zhengfa Dai; Guohong Zhou; Jun Zou; Jiang Li
• Keywords: Luminous flux; Luminous efficacy; Saturation (graph theory); Solid-State Lighting; Laser diode

The major advantage of laser lighting over white light-emitting-diode is the possibility to achieve ultra-high luminance. However, phosphors usually suffer laser-induced luminescence saturation, which limits peak luminance devices. aim present study develop LuAG:Ce/Al₂O₃ composite ceramics (LACCs) with a high saturation threshold for high-luminance lighting. Owning rigid crystal structure, proper synthetic process, and optimized thermal design, LACCs possess small quenching (16% loss in at 225 ℃), quantum yield (> 95%), excellent properties. When are irradiated by blue diodes reflection mode, luminous flux 4634 lm efficacy 283 lm·W⁻¹ realized. Furthermore, they show no sign even when power density reaches 20.5 W·mm⁻². With these favorable properties, designed great potential