Perovskite nanocrystals (NCs) as promising narrow green emitters are widely studied, and many colloidal synthetic methods have been developed. However, large amounts of expensive and toxic organic solvents are consumed in synthesis. Herein, a high temperature solid-state confined growth strategy was developed to prepare highly emissive CsPbBr 3 NCs using the in situ formed mesoporous Al 2 O 3 as the template. The obtained CsPbBr 3 −Al 2 O 3 powders possessed high quantum yield up to 70%, narrow emission line width of 25 nm, and outstanding thermal stability even better than the KSF phosphor. In addition, 500 g CsPbBr 3 − Al 2 O 3 powders in one batch have been achieved, which demonstrated the potential capability of mass production with this method. Finally, this method can be expanded to other CsPbX 3 (X = Cl, I) NCs through changing the halide salts. We believe that this versatile method opens up a new avenue for the large scale synthesis of high quality perovskite NCs with low cost.

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This paper focuses on the structure modification of sensitizers for efficient porphyrin-sensitized solar cells (PSSCs).

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