A Hierarchical Structure Perovskite Quantum Dots Film for Laser‐Driven Projection Display

Abstract Laser‐driven projection display puts forward urgent demand for color converter materials to achieve wide‐color‐gamut and high‐quality image presentation. In this study, a hierarchical structure quantum dots‐in‐glass film (QiGF) is fabricated via co‐sintering stable green/red‐emitting CsPbX 3 @glass (X 3 = Br 3 , Br 1.5 I 1.5 ) and commercial low‐melting glass on the sapphire substrate. Benefiting from the well‐retained optical properties of CsPbX 3 quantum dots in amorphous glass and high thermal conductivity, QiGF succeeded in inhibiting luminescence saturation after 20 W mm −2 blue laser irradiation. A brand‐new white‐lighting source designed by coupling a blue laser with a pattern “QiGF wheel” produced ultra‐narrow blue/green/red tri‐color emissions and total luminous flux of 146 lm. Accordingly, a QiGF‐converted laser projection system is successfully designed for the first time, showing more natural and real color restoration for its wide color gamut display feature (157% of conventional light‐emitting diode projection and 107% of NTSC standard). The present study highlights the practical application of CsPbX 3 quantum dots composite as an efficient laser‐driven color converter in projection display.