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All-Inorganic CsPbBr 3 Perovskite Nanocrystals Synthesized with Olive Oil and Oleylamine at Room Temperature.

Authors :
Welyab, Getachew
Abebe, Mulualem
Mani, Dhakshnamoorthy
Thankappan, Aparna
Thomas, Sabu
Aga, Fekadu Gochole
Kim, Jung Yong
Source :
Micromachines; Jul2023, Vol. 14 Issue 7, p1332, 14p
Publication Year :
2023

Abstract

Room temperature (RT) synthesis of the ternary cesium lead bromide CsPbBr<subscript>3</subscript> quantum dots with oleic acid and oleylamine ligands was developed by Zeng and coworkers in 2016. In their works, the supersaturated recrystallization (SR) was adopted as a processing method without requiring inert gas and high-temperature injection. However, the oleic acid ligand for haloplumbate is known to be relatively unstable. Hence, in this work, we employed the eco-friendly olive oil to replace the oleic acid portion for the SR process at RT. Resultantly, we found that the cube-shaped nanocrystal has a size of ~40–42 nm and an optical bandgap of ~2.3 eV independent of the surface ligands, but the photoluminescence lifetime (τ<subscript>av</subscript>) and crystal packing are dependent on the ligand species, e.g., τ<subscript>av</subscript> = 3.228 ns (olive oil and oleylamine; here less ordered) vs. 1.167 ns (oleic acid and oleylamine). Importantly, we explain the SR mechanism from the viewpoint of the classical LaMer model combined with the solvent engineering technique in details. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
2072666X
Volume :
14
Issue :
7
Database :
Complementary Index
Journal :
Micromachines
Publication Type :
Academic Journal
Accession number :
169332166
Full Text :
https://doi.org/10.3390/mi14071332