The enhanced color conversion of the silver NPs-doped quantum dots film

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-07-04 DOI:10.1016/j.jlumin.2025.121394

Weihao Wan , Zhuonan Liu , Peiquan Yu , Jianbo Xiao , Yujie Tao , Qing Zhao , Xiaoping Huang

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引用次数: 0

Abstract

Quantum dots (QDs) are recognized as fundamental key components in micro-LED color conversion systems, serving as critical enablers for high-fidelity full-color displays. Silver nanoparticles (Ag NPs) exhibit surface plasmon resonance effects under photoexcitation, which can be utilized to enhance QDs color conversion for micro-LED. In this paper, the incorporation of SiO₂-encapsulated Ag NPs (Ag NPs@SiO₂) into CdSe QDs inks with varying mass ratios enabled quantitative evaluation of photoluminescence quantum yield (PLQY) enhancement through comparative spectroscopy investigation. Experimental measurements and numerical simulations with multiple concentration gradients of the mixed QDs solution jointly validated the nonlinear field enhancement trend. The spin-coated composite film prepared by mixing 10 μL of Ag NPs@SiO₂ aqueous solution (0.1 mg/mL) with 1 mL of CdSe QDs inks (1.2 g/mL) in Sample 6 demonstrated an optimal color-conversion efficiency enhancement, achieving a remarkable improvement exceeding 20 %. Based on the optimal ratio between Ag NPs@SiO₂ aqueous solution and CdSe QDs inks, blade-coating samples were fabricated by incorporating 20 μL Ag NPs@SiO₂ into 2 mL CdSe QDs inks. The resultant devices exhibited a fluorescence enhancement of 7 % with an external quantum efficiency (EQE) of 22.6 %. To improve the dispersion and uniformity of particles in the solution, 1 mL of 5 % CdSe QDs inks and 1 mL of 1 mg/mL Ag NPs@SiO₂ ethanol solution were mixed for the blade-coating samples. The fluorescence enhancement of blade coating films with the mixed QDs ethanol solution reaches 28.73 %, and the EQE reaches 23.4 %. And, the experimental results exhibited a strong congruence with the FDTD simulation results. Overall, the findings in this paper demonstrated a technical viability of plasmon-enhanced micro-LED systems for next-generation displays, establishing a materials engineering framework with cross-disciplinary implications in optoelectronics and nanophotonics.

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掺银nps量子点薄膜的增强色转换

量子点（QDs）被认为是微型led颜色转换系统的基本关键组件，是高保真全彩显示的关键实现因素。银纳米粒子（Ag NPs）在光激发下表现出表面等离子体共振效应，可用于提高微led的量子点颜色转换。在本文中，将sio2封装的Ag NPs （Ag NPs@SiO2）加入到不同质量比的CdSe量子点油墨中，通过比较光谱研究，可以定量评估光致发光量子产率（PLQY）的增强。多浓度梯度混合量子点溶液的实验测量和数值模拟共同验证了非线性场增强趋势。样品6中加入10 μL Ag NPs@SiO2水溶液（0.1 mg/mL）和1 mL CdSe QDs油墨（1.2 g/mL）制备的自旋包覆复合膜，可显著提高颜色转换效率，提高幅度超过20%。根据银NPs@SiO2水溶液与CdSe量子点油墨的最佳配比，在2 mL CdSe量子点油墨中加入20 μL银NPs@SiO2，制备了叶片涂层样品。所得器件的荧光增强率为7%，外量子效率（EQE）为22.6%。为了改善颗粒在溶液中的分散和均匀性，将1 mL 5% CdSe QDs油墨与1 mL 1 mg/mL Ag NPs@SiO2乙醇溶液混合用于叶片涂层样品。混合QDs乙醇溶液对叶片涂层的荧光增强效果达到28.73%，EQE达到23.4%。实验结果与FDTD仿真结果具有较强的一致性。总体而言，本文的研究结果证明了等离子体增强微型led系统用于下一代显示器的技术可行性，建立了具有光电子学和纳米光子学跨学科意义的材料工程框架。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.