Narrow-Bandwidth Blue-Emitting Ag-Ga-Zn-S Semiconductor Nanocrystals for Quantum-Dot Light-Emitting Diodes.
Narrow-Bandwidth Blue-Emitting Ag-Ga-Zn-S Semiconductor Nanocrystals for Quantum-Dot Light-Emitting Diodes.
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DOI：
10.1021/acs.jpclett.2c03437
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发表时间：
2022-12
期刊：
影响因子：
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通讯作者：
Xiulin Xie;Jinxing Zhao;Ouyang Lin;Zhe Yin;Xu Li;Yu Zhang;A. Tang
中科院分区：
文献类型：
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作者：
Xiulin Xie;Jinxing Zhao;Ouyang Lin;Zhe Yin;Xu Li;Yu Zhang;A. Tang
I-III-VI型半导体纳米晶(NCS)在显示领域引起了极大的关注。本论文采用一锅法制备了窄带蓝光发射的Ag-Ga-Zn-S(AgZS)纳米碳管。有趣的是，Ag/Zn和Ag/Ga的馈电比是实现窄带AGZS NCS的关键。通过选择4：1的Ag/Zn和1：8的Ag/Ga，AgZS纳米管在470 nm处表现出典型的蓝光发射，半高宽为48 nm，主要由带-空穴复合而不是施主-受主对(DAP)复合产生。此外，基于AGZS NCS的溶液处理量子点发光器件具有53 nm的窄电致发光带宽和超过123.1 cdm-2的高亮度，以及0.40%的高外量子效率。我们的工作突出表明，AGZS NCS具有高颜色纯度，是蓝光发光器件的重要候选者。
I-III-VI type semiconductor nanocrystals (NCs) have attracted considerable attention in the display field. Herein, we realized the synthesis of narrow-bandwidth blue-emitting Ag-Ga-Zn-S (AGZS) NCs via a facile one-pot method. Intriguingly, the Ag/Zn feeding ratio and Ag/Ga feeding ratio are crucial for the realization of narrow-bandwidth AGZS NCs. By choosing a Ag/Zn feeding ratio of 4:1 and Ag/Ga feeding ratio of 1:8, AGZS NCs demonstrate a typical blue emission at 470 nm with a narrow full width at half-maximum (fwhm) of 48 nm, which is mainly generated from the band-to-hole recombination rather than the donor-acceptor pair (DAP) recombination. Furthermore, a solution-processed quantum-dot light-emitting device based on AGZS NCs exhibits a narrow electroluminescent bandwidth of 53 nm and high luminance over 123.1 cd m-2, as well as a high external quantum efficiency (EQE) of 0.40%. Our work highlights AGZS NCs with high color purity as an important candidate for blue-light-emitting devices.