具有高光致发光量子产率的可调光谱水溶液Ag-In-Zn-Ga-S量子点

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-06-10 DOI:10.1016/j.jlumin.2025.121355

Yikun He, Yongheng Fu, Danni Yan, Shuai Yang, Li Zhang, Jiajun Xu, Feifan Song, Xiaokun Zhang, Yuhui Dong, Yousheng Zou

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引用次数: 0

摘要

近年来，Ag-In-Ga-S （AIGS）量子点作为无毒、环保的量子点受到了广泛的关注。然而，低光致发光量子产率（PLQY）限制了AIGS量子点在光电器件中的进一步应用。本文采用经济环保的水热方法，在AIZGS量子点中掺杂Zn，构建出PLQY高达92.1%的Ag-In-Zn-Ga-S （AIZGS）量子点。提供辐射复合通道的内部掺杂Zn和钝化非辐射复合缺陷的表面掺杂Zn的协同作用导致量子点的PLQY增强。基于AIZGS量子点和聚乙烯醇（PVA）制备的相应量子点背光薄膜也显示出高达82.7%的PLQY。改进后的AIZGS量子点的PLQY可与其他有毒含金属量子点在同一光谱中相媲美。此外，通过改变Ag/In比，量子点的PL峰值波长可以从545 nm调谐到616 nm。在水性AIZGS量子点及其背光薄膜中实现高PLQY有助于在环保背光显示器件领域的应用。

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Tunable spectrum aqueous Ag-In-Zn-Ga-S quantum dots with high photoluminescence quantum yield

In recent years, Ag-In-Ga-S (AIGS) quantum dots (QDs) have received widespread attention as non-toxic and environmentally friendly QDs. However, the low photoluminescence quantum yield (PLQY) restricts the further application of AIGS QDs in optoelectronic devices. Here, we constructed quinary Ag-In-Zn-Ga-S (AIZGS) QDs with outstandingly high PLQY of 92.1 % by doping Zn into AIGS QDs via an economical and environment-friendly hydrothermal method. The synergistic action of the internal doped Zn providing radiative recombination channels and the surface doped Zn passivating the non-radiative recombination defects leads to enhanced PLQY of QDs. The corresponding QDs backlight films fabricated based on AIZGS QDs and polyvinyl alcohol (PVA) also show a high PLQY of 82.7 %. The improved PLQY of AIZGS QDs is comparable to other toxic metal-containing QDs in the same spectrum. Furthermore, the PL peak wavelength of the QDs can be tuned from 545 nm to 616 nm by varying the Ag/In ratio. The realization of high PLQY in aqueous AIZGS QDs and its backlight films contributes to the application in the field of eco-friendly backlight display devices.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.