An environment-friendly backlight display material: Dy3+-doped CsPbBr3 perovskite quantum dot glass with super high stability and ultra-wide color gamut

Abstract

In recent years, all-inorganic perovskite quantum dots glass (PeQDsG) has become an attractive candidate material for backlight display due to its unique advantages. Therefore, high-quality PeQDsG has become a research hotspot. Here, Dy3+-CsPbBr3 QDsG (Dy3+-CPB QDsG) is synthesized in borosilicate glass by melt-quenching method. Dy3+ can partially replace the Pb2+ in PeQDsG to reduce the impact of the Pb toxicity. Moreover, the full width at half maximums (FWHM) is ≈ 18 nm. Surprisingly, the PL intensity of Dy3+-CPB QDsG recedes merely 5% even though under the condition of 60 °C, 90% relative humidity, and 880W/m2 power density of blue light (60 °C/90% RH/880 W/m2) for 48 h, which is close to the standard stability of current commercial CdSe. PeQDsG@Polyimide (PI) film with a color gamut of up to 128% NTSC 1953 is prepared, and more details of object color are displayed on the liquid crystal display (LCD) screen. We believe that an environmentally friendly Dy3+-CPB QDsG is potential to be a new luminescent material for the next generation of LCD.