Simulations studies of avalanche multiplication effect in avalanche-luminescence dual-action structure for noncarrier injection Nano-LED

IF 9.7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Physics Pub Date : 2025-08-12 DOI:10.1016/j.mtphys.2025.101835

Wenhao Li , Shuqian Zhang , Xiangyao Zeng , Xiongtu Zhou , Yongai Zhang , Tailiang Guo , Chaoxing Wu

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Abstract

As an emerging driving mode based on the principle of electrostatic induction, the noncarrier injection (NCI) mode is expected to propel micro/nano-based light-emitting display technology toward a future that is more immersive, intelligent, and integrated. However, the further improvement of electroluminescence efficiency is a problem to be solved urgently at present for the nanoscale light-emitting diode (nLED) operating in NCI mode. In this work, the avalanche multiplication effect in the NCI-nLED is investigated through finite element simulations. The carriers generated by the avalanche effect play a key role in enhancing the performance of NCI-nLED is revealed. The dynamic variation of carrier concentration and the energy band is studied to analyze the generation process of the avalanche effect and the mechanism of noncarrier electroluminescence enhancement. Importantly, we propose a potentially ultra-simple symmetrical structure characterized by two single-quantum wells (QWs) avalanche junctions, where a single-QW functions as both the avalanche layer and the luminescence layer. It is demonstrated that the electroluminescence intensity of this structure can be increased to 14.19 times compared with that of original structure. The simulation work advances the theoretical model for understanding the NCI mode and opens a new perspective for the application expansion of display technology.

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非载流子注入纳米led雪崩-发光双作用结构雪崩倍增效应的模拟研究

非载流子注入（NCI）模式作为一种基于静电感应原理的新兴驱动模式，有望推动微纳米发光显示技术走向更加沉浸式、智能化和集成化的未来。然而，进一步提高电致发光效率是目前纳米级发光二极管（nLED）工作在NCI模式下急需解决的问题。本文通过有限元模拟研究了NCI-nLED的雪崩倍增效应。揭示了雪崩效应产生的载流子对提高NCI-nLED的性能起着关键作用。研究了载流子浓度和能带的动态变化，分析了雪崩效应的产生过程和非载流子电致发光增强的机理。重要的是，我们提出了一个潜在的超简单对称结构，其特征是两个单量子阱（qw）雪崩结，其中单量子阱同时作为雪崩层和发光层。结果表明，该结构的电致发光强度比原结构提高了14.19倍。仿真工作提出了理解NCI模式的理论模型，为显示技术的应用拓展开辟了新的视角。

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

Materials Today Physics Materials Science-General Materials Science

CiteScore

14.00

自引率

7.80%

发文量

284

审稿时长

15 days

期刊介绍： Materials Today Physics is a multi-disciplinary journal focused on the physics of materials, encompassing both the physical properties and materials synthesis. Operating at the interface of physics and materials science, this journal covers one of the largest and most dynamic fields within physical science. The forefront research in materials physics is driving advancements in new materials, uncovering new physics, and fostering novel applications at an unprecedented pace.