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水热法制备的水溶性CuInS量子点光致发光的起源。

Origin of photoluminescence of water-soluble CuInS quantum dots prepared a hydrothermal method.

作者信息

Iida Kazutaka, Uehigashi Yota, Kim DaeGwi

机构信息

Department of Applied Physics, Graduate School of Engineering, Osaka City University 3-3-138, Sugimoto, Sumiyoshi-ku Osaka 558-8585 Japan

出版信息

RSC Adv. 2021 Oct 8;11(53):33186-33191. doi: 10.1039/d1ra05761h.

DOI:10.1039/d1ra05761h
PMID:35497559
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9042224/
Abstract

This study was performed to investigate the origin of the photoluminescence (PL) properties of hydrothermally-synthesized water-soluble CuInS (CIS) quantum dots (QDs). The corresponding PL decay profiles, time-resolved PL spectra, and excitation intensity dependence of the PL spectra were evaluated. The decay profiles exhibited a strong dependence on the detection energy, and the peak of the time-resolved PL spectra shifted to lower energies with increasing time. With increasing excitation light intensity, the PL peak shifted to the high-energy side. These experimental results were consistent with the characteristics of donor-acceptor pair emission. The PL properties of Cu-doped and non-doped CdSe QDs, which show Cu-related and defect-related PL emission, respectively, were compared. Based on these results, it was concluded that donor-acceptor pair emission is the underlying mechanism of the PL of the hydrothermally-synthesized water-soluble CIS QDs.

摘要

本研究旨在探究水热合成的水溶性铜铟硫（CIS）量子点（QDs）的光致发光（PL）特性的起源。评估了相应的PL衰减曲线、时间分辨PL光谱以及PL光谱的激发强度依赖性。衰减曲线表现出对检测能量的强烈依赖性，并且时间分辨PL光谱的峰值随着时间增加向更低能量移动。随着激发光强度增加，PL峰向高能侧移动。这些实验结果与施主-受主对发射的特征一致。比较了分别显示与铜相关和与缺陷相关的PL发射的掺铜和未掺铜的CdSe量子点的PL特性。基于这些结果，得出结论：施主-受主对发射是水热合成的水溶性CIS量子点PL的潜在机制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/fd6379262215/d1ra05761h-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/2ccb54dad9e4/d1ra05761h-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/1ea2366cc303/d1ra05761h-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/367386d0e3c5/d1ra05761h-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/ad0376782681/d1ra05761h-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/dc5f12109c51/d1ra05761h-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/fd6379262215/d1ra05761h-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/2ccb54dad9e4/d1ra05761h-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/1ea2366cc303/d1ra05761h-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/367386d0e3c5/d1ra05761h-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/ad0376782681/d1ra05761h-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/dc5f12109c51/d1ra05761h-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/475f/9042224/fd6379262215/d1ra05761h-f6.jpg

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本文引用的文献

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