High color rendering index composite phosphor-in-glass for high-power white laser lighting.

• Composite LuAG&CASN-PiGs have been successfully synthesized. • LuAG&CASN-PiG showed a high IQE of 87 % and EQE of 61 %. • A high quality white light (Ra＝95) in LD based on the PiG was achieved. • The LDs based on the PiG realized high laser saturation threshold (＞2.7 W mm−2). • The converted LDs with heat sink exhibited a superior LE of 216.79 lm W−1. The aim of this study is to investigate a thermally robust white color converter for high-power solid-state lighting, especially laser lighting. Lu 3 Al 5 O 12 :Ce3+/CaAlSiN 3 :Eu2+ phosphor-in-glass samples (LuAG&CASN-PiGs) were synthesized via a low temperature co-sintering technique. The prepared LuAG&CASN-PiGs exhibited remarkably high internal quantum efficiency of 87 %. Tunable warm white light-emitting diodes (wLED) were acquired by tailoring the sample thicknesses and phosphor contents. The optimized sample showed a high luminous flux of 183.68 lm under a blue laser diodes (LDs). In addition, the chromaticity of white LDs based on the LuAG&CASN-PiGs shifted from cool to warm white by changing the sample thicknesses. High quality white light in wLDs was achieved (Ra＝95). More importantly, the constructed LuAG&CASN-PiG converted LDs with a heat sink exhibited the luminous efficiency of 216.79 lm W−1. The results revealed that the prepared LuAG&CASN-PiG had great potential for application in solid-state laser light sources. [ABSTRACT FROM AUTHOR]