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Title: Light-induced effects on crystal size and photo-stability of colloidal CsPbBr3 perovskite nanocrystals
Authors: Esparza Salazar, Diego
Sidhik, Siraj
López Luke, Tzarara
Rivas Martínez, Jesús Manuel
De la Rosa, Elder
Issue Date: 18-Jan-2019
Publisher: IOP Publishing Ltd
Abstract: CsPbBr3 perovskite nanocrystals (PNCs) have been synthesized using the hot injection method. The CsPbBr3 PNCs exhibit a high photoluminescence quantum yield (PLQY) of 73%. A comprehensive study of UV light interaction with the CsPbBr3 PNCs was performed. SEM images, photolumines- cence spectra, x-ray Diffraction and PLQY measurements were obtained for different time of UV exposure. The exposure to UV light modifies the crystal size (from 10 ×10 nm to 12 × 95 nm) and morphology (change from nanocubic to nanorods form). The XRD spectra show a change from tetragonal to cubic crystalline structure. In addition, the interaction of UV light modifies the optical properties of the PNCs by varying the photoluminescence. The material remains stable for a period of 1 h, however, with exposure to UV light, the PNCs show a decrement in QY from 73.3% to 46.6% after 30 days. These results indicate that light-induce variation in morphological and photo-stability of CsPbBr3 PNCs.
ISSN: 2053-1591
Other Identifiers: info:eu-repo/semantics/publishedVersion
Appears in Collections:*Documentos Académicos*-- M. en Ciencias de la Ing.

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