利用石墨烯连接微柱结构和Ag/SiO2纳米颗粒增强微型led的发光性能

IF 6.7 1区物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Photonics Pub Date : 2025-02-11 DOI:10.1021/acsphotonics.4c01514

Aoqi Fang, Qingqing Li, Jixin Liu, Zaifa Du, Penghao Tang, Hao Xu, Yiyang Xie, Jibin Song, Kaixin Zhang, Tianxi Yang, Qun Yan, Weiling Guo, Jie Sun

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引用次数: 0

摘要

本文报道了一种由石墨烯导电层和SiO2包覆银纳米粒子（Ag/SiO2 NPs）增强的微柱微型发光二极管（MP-μLED）。微柱结构使银/SiO2纳米粒子与量子阱（QW）直接接触，利用局域表面等离子体共振（LSPR）增强量子阱的发射。Ag表面的SiO2涂层起到绝缘层的作用，防止QW-Ag和Ag - Ag界面之间的电子隧穿导致能量泄漏。石墨烯用作透明导电层，将单个微柱整合成一个内聚结构，确保高效的电流扩散和均匀的发光。与相同台面尺寸的平面μ led相比，采用石墨烯透明电极和LSPR增强的MP-μLED在电流密度为1000 a /cm2时，外量子效率（EQE）提高了44%，壁塞效率（WPE）提高了45%。该研究显示了LSPR和微柱结构在μLED技术中的重要应用潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhanced Light Emission of Micro LEDs Using Graphene-Connected Micropillar Structures and Ag/SiO2 Nanoparticles

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Enhanced Light Emission of Micro LEDs Using Graphene-Connected Micropillar Structures and Ag/SiO2 Nanoparticles

This paper reports on a micropillar micro-light-emitting diode (MP-μLED) enhanced by a graphene conductive layer and SiO₂-coated Ag nanoparticles (Ag/SiO₂ NPs). The micropillar structure enables direct contact between Ag/SiO₂ NPs and the quantum well (QW), leveraging localized surface plasmon resonance (LSPR) to enhance the emission of QW. The SiO₂ coating on Ag serves as an insulating layer, preventing energy leakage through electron tunneling between QW–Ag and Ag–Ag interfaces. Graphene, used as a transparent conductive layer, integrates the individual micropillars into a cohesive structure, ensuring efficient current spreading and uniform light emission. Compared to plane μLEDs of the same mesa size, the MP-μLED with graphene transparent electrodes and LSPR enhancement shows an improvement of 44% in external quantum efficiency (EQE) and 45% in wall plug efficiency (WPE) at a current density of 1000 A/cm². This study demonstrates the significant application potential of LSPR and micropillar structures in μLED technology.

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来源期刊

ACS Photonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

11.90

自引率

5.70%

发文量

438

审稿时长

2.3 months

期刊介绍： Published as soon as accepted and summarized in monthly issues, ACS Photonics will publish Research Articles, Letters, Perspectives, and Reviews, to encompass the full scope of published research in this field.