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At present, fluorescent glass mainly emits a single yellow light. The characteristic of green and red luminescent materials limits its omni-directional combination with yellow light materials, resulting in high correlated color temperature and low color rendering index of laser lighting devices, which seriously reduces the quality of laser lighting. Therefore, the development of multi-color fluorescent glass to improve the color quality is a huge challenge in laser lighting technology. In this research, the glass matrix that can be compounded with multi-color phosphors is proposed to solve the problems of phosphor decomposition, oxidation, corrosion, and blackening during the vitrification process. Surprisingly, a 50 wt. % Ce:YAG&1.5 wt. % CaAlSiN3-PiG (50 Y&1.5 R-PiG) sample exhibits an excellent internal quantum efficiency of 94% and achieves a high luminous efficiency of 184 lm/W under laser irradiation. Moreover, an ultrahigh luminous efficiency of 331 lm/W is realized by using a laser device with a heat sink. It demonstrated that Y&R-PiG can own excellent application prospects in high-quality lighting fields, such as laser displays and automobile headlights. [ABSTRACT FROM AUTHOR]

All inorganic remote Ce3+:Y3Al3.5Ga1.5O12 (Ce:YAGG) phosphor-in-glass (PIG) is considered to be an ideal robust green-emitting light converter for high-quality laser diode applications. Herein, the preparation of Ce:YAGG PIGs using an economical solid state reaction is reported. The sintered composite materials have the advantages of yielding a high transparency of 53% in the visible region and a high internal quantum efficiency of 92.7%. Benefiting from remarkably superior thermal properties, a high thermal conductivity of 1.712 W m−1 K−1 and a high thermal stability that the luminescence intensity could maintain 91.6% at 503 K, and the PIG can withstand 3.49 W/mm2 blue laser radiation. When pumped by blue laser diodes and by controlling the phosphor content and a thickness of samples, the robust PIG materials produce green light with a luminous flux of 555.6 lm and a stable luminous efficiency of 254.5 lm/W as the blue laser density increasing up to 2.78 W/mm2. The above outstanding performance of Ce:YAGG PIGs indicates a strong perspective for future lighting source. [ABSTRACT FROM AUTHOR]