Broadband photodetectors from silane-passivated CsPbBr3 nanocrystals by ultrasound-mediated synthesis

Fernando Ely*, Kayo O. Vieira, Martin G. Reyes-Banda, Manuel Quevedo-Lopez

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Perovskite nanocrystals have excellent optical properties but suffer from environmental instability and production up-scaling which limit their commercial application. Here, we report the gram-scale ultrasound-mediated synthesis of silane passivated CsPbBr3 nanocrystals using (3-aminopropyl) triethoxysilane (APTS) as the primary surface ligand surface. The surface engineering endowed the CsPbBr3@SiOR NCs with extended environmental stability, a narrow emission bandwidth and a high photoluminescence quantum yield (PLQY > 75%). Thanks to these excellent optical properties, high-efficiency lateral and vertical photodetectors were fabricated. In particular, the layered vertical photodiode composed of ITO/Ga2O3/CsPbBr3/Au exhibited a broadband photoresponse from 350-700 nm with a responsivity peaking at 44.5.1 A W−1 and specific detectivity above 1013 Jones when illuminated at 470 nm wavelength and biased at +5 V. These results correspond to the best-in-class performance perovskite nanocrystal PD and confirm the extraordinary potential of CsPbBr3@SiOR for the development of efficient optoelectronic devices.

Original languageEnglish
Pages (from-to)10833-10840
Number of pages8
JournalNanoscale
Volume16
Issue number22
DOIs
StatePublished - 7 May 2024

Bibliographical note

Publisher Copyright:
© 2024 The Royal Society of Chemistry.

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