We report the synthesis of monodisperse colloidal CsX (X = Cl, Br, I) nanocrystals (NCs) and their transformation into CsPbX₃ perovskite NCs via cation exchange with Pb²⁺. The process proceeds through intermediate CsX/CsPbX₃ core–shell structures, preserving shape while reducing size. High-resolution TEM and optical studies confirm the transformation pathway and structural evolution. The resulting perovskite NCs show size-dependent photoluminescence with quantum yields up to 60% after surface passivation.
Colloidal CsX (X = Cl, Br, I) Nanocrystals and Their Transformation to CsPbX3 Nanocrystals by Cation Exchange
Bertoni G.;Manna L.
Ultimo
2018
Abstract
We report the synthesis of monodisperse colloidal CsX (X = Cl, Br, I) nanocrystals (NCs) and their transformation into CsPbX₃ perovskite NCs via cation exchange with Pb²⁺. The process proceeds through intermediate CsX/CsPbX₃ core–shell structures, preserving shape while reducing size. High-resolution TEM and optical studies confirm the transformation pathway and structural evolution. The resulting perovskite NCs show size-dependent photoluminescence with quantum yields up to 60% after surface passivation.File in questo prodotto:
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shamsi-et-al-2017-colloidal-csx-(x-cl-br-i)-nanocrystals-and-their-transformation-to-cspbx3-nanocrystals-by-cation.pdf
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