Highlights

• The study develops a template-assisted solid-state synthesis strategy using in situ formed mesoporous Al₂O₃ to confine CsPbBr₃ nanocrystal growth.
• The resulting CsPbBr₃-Al₂O₃ powders show quantum yield up to 70%, 25 nm linewidth, and outstanding thermal stability.
• A 500 g batch was achieved, demonstrating potential for large-scale production with lower solvent use and lower cost.

Summary

This paper directly addresses the manufacturing challenge of perovskite nanocrystals. While colloidal methods can produce high-quality nanocrystals, they often require expensive and toxic organic solvents. Professor Li’s team developed a high-temperature solid-state confined-growth method in which mesoporous alumina controls nanocrystal size during synthesis. The result is a luminescent powder with strong green emission, narrow linewidth, and thermal stability that can rival or exceed established phosphors. The 500 g batch is particularly important because it shows the approach is not only scientifically interesting but also scalable. This work shifts the cluster toward industrially relevant synthesis.

Citation: B. Wang et al., “Large-scale synthesis of highly luminescent perovskite nanocrystals by template-assisted solid-state reaction at 800 °C,” Chemistry of Materials, vol. 32, pp. 308–314, 2020, doi: 10.1021/acs.chemmater.9b03804.