Highlights

• This paper achieves ceramic-like stability by growing and encapsulating CsPbBr₃ nanocrystals inside silica derived from molecular sieve templates at 600–900 °C.
• The powders show approximately 71% photoluminescence quantum yield and stability comparable to ceramic Sr₂SiO₄:Eu²⁺ green phosphor.
• The material maintains 100% photoluminescence under blue LED-chip illumination for 1000 hours and survives in 1 M hydrochloric acid for 50 days.

Summary

This study is a major milestone in the journey from fragile perovskite nanocrystals to ceramic-stable fluorescent materials. The key idea is to use molecular sieve templates to confine perovskite nanocrystal growth and then form a dense silica environment around them. The resulting CsPbBr₃-SiO₂ powders retain strong luminescence while achieving exceptional resistance to light, heat, moisture, and acid. This solves one of the biggest criticisms of perovskite nanocrystals: their poor operational stability. The work demonstrates that perovskite emitters can approach the durability of ceramic phosphors, making them more competitive for practical LED and backlight display applications.

Citation: Q. Zhang et al., “Ceramic-like stable CsPbBr₃ nanocrystals encapsulated in silica derived from molecular sieve templates,” Nature Communications, vol. 11, article 31, 2020, doi: 10.1038/s41467-019-13881-0.