Zinc Borosilicate Glass-Stabilized CsPbX3 (X = Cl, Br, I) Perovskite Quantum Dots for Photoluminescence Lighting and Display Applications

CsPbX 3 (X = Cl, Br, I) quantum dots (QDs) are rapidly emerging as a generation of photoelectric functional materials because of their excellent photoelectric properties. However, CsPbX 3 QDs reveal poor stability and easily decompose in solution and high-temperature environments, which inhibits their application in lighting display. In situ growth of CsPbX 3 QDs in amorphous glass has become an important means to significantly improve their stability. Herein, the CsPbX 3 QDs are introduced into a zinc borosilicate glass matrix with high thermal shock and good hydrolysis resistances to obtain zinc borosilicate glass-stabilized CsPbX 3 QDs. Importantly, the highest quantum efficiencies (30–50%) of CsPbX 3 QDs glasses are exhibited in contrast to rare-earth-based phosphors. Benefiting from the effective protection of the zinc borosilicate glass matrix, CsPbX 3 QDs glasses reveal superior water resistance, in which the 90% luminous intensity of CsPbX 3 QDs glasses was maintained after their immersion in water for 32 days. In addition, the high thermal stability and inhibition of halogen anion exchange were demonstrated. Two prototype light-emitting-diode devices are assembled via monochromatic and blue/cyan/orange CsPbX 3 QDs glass powders with a InGaN blue chip, yielding bright multicolor light with excellent performance. Zinc borosilicate glass-stabilized CsPbX 3 QDs with excellent fluorescence properties and high stability provide important insight for the application of lighting displays.