Preparation and fluorescence properties of SiO2-coated CsPbBrI2 perovskite nanocrystals

All-inorganic perovskite nanocrystals CsPbX3 (X=Cl, Br, I) have garnered significant interest due to their promising applications and have become a leading research subject in the field of optoelectronics. The weak stability of CsPbBrI2 perovskite nanocrystals has hindered their development, however...

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Published inJournal of physics. Conference series Vol. 2578; no. 1; pp. 012014 - 12018
Main Authors Ma, Siyu, Zhang, Jing, An, Limin
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.08.2023
Subjects
Aminopropyltriethoxysilane
Core-shell structure
Excitons
Fluorescence
Nanocrystals
Optoelectronic devices
Perovskites
Physics
Raw materials
Silicon dioxide
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Summary:All-inorganic perovskite nanocrystals CsPbX3 (X=Cl, Br, I) have garnered significant interest due to their promising applications and have become a leading research subject in the field of optoelectronics. The weak stability of CsPbBrI2 perovskite nanocrystals has hindered their development, however, silica coating can effectively solve this problem. The (3-aminopropyl) triethoxysilane was used as a raw material for silica synthesis to form core-shell structured CsPbBrI2@SiO2 perovskite nanocrystals to obtain enhanced optoelectronic properties. This article reveals the narrow absorption and emission peaks, small half-height widths, 14.6 ns fluorescence lifetimes, and 106.2 meV exciton binding energies of CsPbBrI2@SiO2 perovskite nanocrystals. The results show that the core-shell structured CsPbBrI2@SiO2 perovskite nanocrystals prepared by this method have excellent fluorescence spectral properties and hold significant promise for future applications in optoelectronic devices.
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ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2578/1/012014