稳定的cspbbr3 -玻璃纳米复合材料用于低tendue宽色域激光驱动投影显示( Stable CsPbBr3-Glass Nanocomposite for Low-tendue Wide-Color-Gamut Laser-Driven Projection Display )

S Lin H Lin G Chen J Xu Y Wang CsPbBr3 glass ceramics lasers perovskites projection displays

Up‐toヾate laserヾriven 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 CsPbBr3ゞlass nanocomposite, i.e., CsPbBr3 glass ceramic film sintered on sapphire plate, the application availability of this famous green〆mitting phosphor is demonstrated in laserヾriven projection. The monoヾispersed perovskite CsPbBr3 nanostructure in amorphous glass matrix and the negligible thermal corrosion during co﹕intering with low﹎eltingゞlass 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 mm2, 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 CsPbBr3 come true. A new architecture design based on CsPbBr3ゞlass nanocomposite, i.e., CsPbBr3 glass ceramic film sintered on sapphire plate, is demonstrated as a promising green〆mitting material of laserヾriven projection display.

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