Phosphor

Engineering

Color temperature

Materials science

Ceramic

Layer (electronics)

Visible light communication

Perovskite (structure)

Photoluminescence

Chemical engineering

Quantum yield

Luminous efficacy

Diode

Visible spectrum

Physics

Nanotechnology

Organic chemistry

Optics

Luminescence

Fluorescence

Composite material

Nanocrystal

Chemistry

Cubic zirconia

Light-emitting diode

Optoelectronics

Laser & Photonics Review

The photoluminescence quantum yield (PLQY) of CsPbBr 3 perovskite nanocrystals (NCs) prepared by the hot‐injection method can exceed 90%, which have attracted intensive attention for white light‐emitting diodes (WLEDs). However, the whole hot‐injection experiment requires air isolation and relatively high temperature. In addition, the poor stability of CsPbBr 3 NCs impedes their applications. Here, a facile method is reported to synthesize CsPbBr 3 @ZrO 2 NCs at room temperature in air. Owing to using ZrO 2 coated CsPbBr 3 NCs, the prepared CsPbBr 3 @ZrO 2 NCs not only present a PLQY of 80% but also exhibit an enhanced stability to heat and moisture. Furthermore, WLEDs are fabricated with CsPbBr 3 @ZrO 2 NCs and commercial red phosphors (CaAlSiN 3 :Eu 2+ ) on blue LEDs chips. The fabricated WLEDs exhibit a correlated color temperature (CCT) of 4743 K and luminous efficacy as high as 64.0 Lm W –1 . In addition, visible light communication with a high data rate of 33.5 Mbps is achieved using the WLEDs. This work provides a room temperature strategy to coat zirconia for CsPbBr 3 @ZrO 2 NCs, benefiting to enhance the optical performance and stability, as well as the promotion of the great potentials in solid‐state illuminating and visible light communication applications.

Room Temperature Synthesis of Stable Zirconia‐Coated CsPbBr<sub>3</sub> Nanocrystals for White Light‐Emitting Diodes and Visible Light Communication

Room Temperature Synthesis of Stable Zirconia‐Coated CsPbBr3 Nanocrystals for White Light‐Emitting Diodes and Visible Light Communication

Room Temperature Synthesis of Stable Zirconia‐Coated CsPbBr₃ Nanocrystals for White Light‐Emitting Diodes and Visible Light Communication