Up-to-date laser-driven projection technology puts an urgent demand for green phosphor with stringent requirements on its performance. Herein, by virtue of a new architecture design based on CsPbBr 3 -glass nanocomposite, i.e., CsPbBr 3 glass ceramic film sintered on sapphire plate, the application availability of this famous green-emitting phosphor is demonstrated in laser-driven projection. The mono-dispersed perovskite CsPbBr 3 nanostructure in amorphous glass matrix and the negligible thermal corrosion during co-sintering with low-melting-glass ensure good luminescent properties. The robust glass host and the carried sapphire substrate with high thermal conductivity contribute to good resistances to thermal shock, moisture, and blue laser irradiation. It is revealed that the thermal accumulation effect is relieved due to the pulsed excitation of rotatory "phosphor wheel," and so the luminescence saturation threshold gets increased. The constructed prototype lighting source yields a low étendue of ≈0.41 mm 2 , a wide color gamut of 128.4% NTSC (95.9% Rec. 2020), and a moderate luminous flux of 174 lm. The present work highlights an unprecedented design that makes the seemingly impossible application of CsPbBr 3 come true.

The green‐emissive laser phosphor is urgently demanded for projection displays to compensate the “Green Gap.” Herein, the well‐known β‐SiAlON:Eu2+ with admirable luminescent feature is incorporated into robust silicate glass matrix, cosintered on sapphire plate, and then constructed into “phosphor wheel,” succeeding in retaining excellent green‐emissive performance and meanwhile relieving the luminescence droop at high pumping density of blue laser. Probing the local effect of laser–matter interaction reveals that the luminescence saturation is majorly determined by thermal quenching, but the influence of intensity quenching cannot be ignored. Systematical works are performed to optimize glass composition, cosintering procedure, sample parameters, and optical path, turning out the maximal quantum efficiency of 60%, thermal conductivity of 9.5 W m−1 K−1, and high saturation threshold far beyond 22 W mm−2. In a proof‐of‐concept experiment, accompanied with red laser diode, the constructed light engine yields a high brightness with luminous flux of 1310 lm (luminance of 880 Mcd m−2), a low étendue of ≈1.5 mm2, and a wide color gamut of 112.5% National Television System Committee (NTSC), demonstrating the composite material as an efficient laser‐driven color converter for projection displays.

No abstract