Interfacial Ligand Length Regulation for Purified Perovskite Quantum Dots with High-Luminescence Stability
발표자
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초록
내용
Halide perovskite quantum dots (PQDs) have high photoluminescence quantum yield, narrow FWHM, and is being actively researched as a next-generation display material. However, it is vulnerable to environmental factors. In this regard, studies have recently been actively conducted to increase the stability due to the washing effect by mixing PQDs with methyl acetate (MeOAc). However, clearly critical condition for exchanging MeOAc with surface ligands are unknown. Therefore, we would like to propose an optimized ligand length and what effect each ligand has on exchanging. As a result, the MeOAc effect was different depending on the length of the ligand, and the presence or absence of ligand exchange was analyzed based on optical properties. In addition, it was confirmed that the yield and luminescence efficiency increased greatly due to MeOAc treatment. Therefore, we propose a suitable ligand by analyzing the relationship between the ligand and MeOAc located on the MAPbBr3 QD surface.