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• β-Sialon-PiG have been successfully prepared and hold a good thermal stability. • β-Sialon-PiG has a high internal quantum efficiency of 72% after synthesis. • Under the 450 nm blue laser, higher luminous efficiency of 154 lm/W was obtained. • A high threshold of 363 lm of lumen flux was obtained for the sample under laser. [Display omitted] With the high demand of modern people for lighting quality, higher requirements have been put forward for the lighting technology. Compared with traditional light emitting diodes (LEDs), laser diode (LD)-driven lighting technology has more prominent advantages in the fields of industry, military and life. Here, we report a phosphor-in-glass (PiG) material formed by co-firing commercial β-Sialon:Eu2+ phosphor and SiO 2 -Na 2 CO 3 -H 3 BO 3 -CaO (SNBC) glass. It is found that the powder perfectly dispersed in the glass without obvious interface reaction. Fluorescence intensity of PiG sintered at 800 °C is the strongest, and the position of the luminescence peak is around 540 nm. Then through the analysis of different concentrations of PiG phosphors, it is found that the internal quantum efficiency (IQE) can reach 72%. The specific heat capacity decreases with the increase of temperature, indicating that the heat dissipation effect is fine. Under the blue LD irradiation of 450 nm, the luminous flux of the PiG sample reaches 363 lm and the high luminous efficiency of 154 lm/W. Our research found that the prepared β-Sialon-PiG can provide green light for high-power laser illumination and is a stable and efficient fluorescent conversion material. [ABSTRACT FROM AUTHOR]

• The high quality and excellent properties of LuAG:Ce PiGs are realized for the first time. • The maximum internal quantum efficiency of LuAG:Ce PiGs can incredibly reach 93.8%. • The conversion efficiency (CE) from blue laser to green light of LuAG:Ce PiG is greatly improved to 56.3%. Luminous efficiency (LE) even reaches 225 lm W−1. [Display omitted] High-power, high-brightness laser lighting technology put forward new requirements for the service stability of color conversion materials. Phosphor-in-glass materials (PiGs) have emerged with their unique advantages of withstanding high power excitation density. High luminous efficiency (LE) and high internal quantum efficiency (IQE) LuAG:Ce PiG is still an urgent demand for high power laser lighting conversion materials. In this paper, LuAG:Ce PiGs was successfully prepared by careful design of glass matrix composition. The maximum internal quantum efficiency of LuAG:Ce PiG is 93.8%. The conversion efficiency (CE) of LuAG:Ce PiG from blue to green light is increased to 56.3%. The luminous efficiency (LE) even reaches 225 lm W−1, which is the best performance of LuAG:Ce in LD lighting so far. These results show that this work has taken a big step in improving the performance of LuAG:Ce Green converter and will greatly promote the development of LD lighting. [ABSTRACT FROM AUTHOR]