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HERO ID
6326246
Reference Type
Journal Article
Title
Effective Stabilization of Perovskite Cesium Lead Bromide Nanocrystals through Facile Surface Modification by Perfluorocarbon Acid
Author(s)
Sato, D; Iso, Y; Isobe, T
Year
2020
Journal
ACS Omega
EISSN:
2470-1343
Publisher
American Chemical Society
Volume
5
Issue
2
Page Numbers
1178-1187
Language
English
PMID
31984275
DOI
10.1021/acsomega.9b03472
Web of Science Id
WOS:000508549200028
Abstract
CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (NCs) have attracted much attention as promising materials for next-generation optoelectronic applications. However, improvement of their low stabilities against heating and humidity is needed for practical use. In this work, we focused on perfluorodecanoic acid (PFDA) as a surface ligand and investigated the thermal and chemical stabilities of the photoluminescence (PL) properties of CsPbBr3 NCs. Oleic acid (OA) adsorbed on the NCs was exchanged for decanoic acid (DA) and PFDA. OA-modified and DA-modified NCs exhibited drastic fluorescence quenching to 12.9 and 21.1% of their initial PL intensities, respectively, after heating at 100 °C for 4 h. In contrast, the PFDA-modified NCs maintained 92.1% of their PL intensity after the same heating. Furthermore, the polar solvent resistance was also improved by PFDA modification. These improvements can be attributed to the strong adsorptivity and high chemical stability of the PFDA ligand.
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PFDA
Literature Search Update 5/2020
PubMed
Literature Search Update 4/2021
PubMed
WoS
Scopus: April 2021
Literature Searches (through April 2023 update and post-public comment/peer review)a
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