Low-Temperature Molten Salts Synthesis: CsPbBr₃ Nanocrystals with High Photoluminescence Emission Buried in Mesoporous SiO₂.

ABSTRACT: Using mesoporous SiO₂ to encapsulate CsPbBr₃ nanocrystals is one of the best strategies to exploit such materials in devices. However, the CsPbBr₃/SiO₂ composites produced so far do not exhibit strong photoluminescence emission and, simultaneously, high stability against heat and water. We demonstrate a molten-salts-based approach delivering CsPbBr₃/mesoporous-SiO₂ composites with high PLQY (89 ± 10%) and high stability against heat, water, and aqua regia. The molten salts enable the formation of perovskite nanocrystals and other inorganic salts (KNO₃-NaNO₃-KBr) inside silica and the sealing of SiO₂ pores at temperatures as low as 350 °C, representing an important technological advancement (a

SUBMITTER: An MN 

PROVIDER: S-EPMC8025713 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature