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Incorporation of potassium halides in the mechanosynthesis of inorganic perovskites: feasibility and limitations of ion-replacement and trap passivation

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Abstract

Potassium halides (KX; X = I, Br, or Cl) were incorporated as partial replacements of CsBr in the mechanosynthesis of CsPbBr 3 . This led to partial substitution of both monovalent ions forming mixed Cs 1−x K x PbBr 3−y X y perovskites. Longer photoluminescence lifetimes were also observed, possibly linked to the formation of a non-perovskite KPb 2 X 5 passivating layer.

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El Ajjouri, Y., Chirvony, V. S., Sessolo, M., Palazon, F., & Bolink, H. J. (2018). Incorporation of potassium halides in the mechanosynthesis of inorganic perovskites: feasibility and limitations of ion-replacement and trap passivation. RSC Advances, 8(72), 41548–41551. https://doi.org/10.1039/c8ra08823c

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