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All-inorganic perovskite materials have emerged as highly promising materials for solar cells and photoelectronic applications. However, the poor stability of perovskites in ambient conditions significantly hampers their practical applications. In this work, we report a three-step synthesis of size tunable CsPbX 3 (X = Br, Cl, or I) quantum dots (QDs) embedded in zeolite-Y (CsPbX 3 -Y), which involves efficient chemical transformation of non-luminescent Cs 4 PbX 6 to highly luminescent CsPbX 3 by stripping CsX through an interfacial reaction with water. We show that the size and the emission of CsPbX 3 in CsPbX 3 -Y can be tuned by the amount of water added as well as the halide composition. More importantly, the as-prepared CsPbX 3 -Y show significantly enhanced stability against moisture upon protection by zeolite-Y. This work not only reports a new pathway for the preparation of highly luminescent CsPbX 3 but also provided new insights into the chemical transformation behavior and stabilization mechanism of these emerging perovskites.

Water-assisted synthesis of highly stable CsPbX3 perovskite quantum dots embedded in zeolite-Y

Water-assisted synthesis of highly stable CsPbX₃ perovskite quantum dots embedded in zeolite-Y