金纳米粒子修饰Ag2S/SiO2胶体量子点的发光特性

IF 0.8 4区物理与天体物理 Q4 OPTICS

Optics and Spectroscopy Pub Date : 2023-02-20 DOI:10.1134/S0030400X22120025

I. G. Grevtseva, O. V. Ovchinnikov, M. S. Smirnov, T. S. Kondratenko, A. S. Perepelitsa, A. M. H. Hussein

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引用次数: 0

摘要

在750 nm区域缺陷发光的量子产率提高了10倍，同时其衰减时间从4 ns增加到200 ns，这是由于在量子点(QDs)表面用金纳米粒子(NPs)(2.0±0.5 nm)修饰Ag2S/SiO2(5.0±1.5 nm)。通过对温度为77 K和300 K的发光动力学分析，得出了等离子体-激子相互作用的非特异性表现是由于Au NPs的极化效应对Ag2S/SiO2量子点缺陷发光动力学形成过程中浅层陷阱性质的影响所致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Luminescence of Ag2S/SiO2 Colloidal Quantum Dots Decorated with Small Au Nanoparticles

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Luminescence of Ag2S/SiO2 Colloidal Quantum Dots Decorated with Small Au Nanoparticles

A tenfold increase in the quantum yield of defect luminescence in the region of 750 nm with a simultaneous increase in its decay time from 4 to 200 ns, due to decoration of surface of quantum dots (QDs) Ag₂S/SiO₂ (5.0 ± 1.5 nm) with Au nanoparticles (NPs) (2.0 ± 0.5 nm). Based on analysis of the luminescence kinetics at temperatures of 77 and 300 K, it was concluded that such a nonspecific manifestation of the plasmon–exciton interaction is caused by the influence of polarization effects from Au NPs on the properties of shallow traps involved in the formation of the defect luminescence kinetics of Ag₂S/SiO₂ QDs.

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来源期刊

Optics and Spectroscopy 物理-光谱学

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： Optics and Spectroscopy (Optika i spektroskopiya), founded in 1956, presents original and review papers in various fields of modern optics and spectroscopy in the entire wavelength range from radio waves to X-rays. Topics covered include problems of theoretical and experimental spectroscopy of atoms, molecules, and condensed state, lasers and the interaction of laser radiation with matter, physical and geometrical optics, holography, and physical principles of optical instrument making.