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Biasing of P-N Junction01:16

Biasing of P-N Junction

The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...

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波长稳定的基于InGaN的珀色微型LED.

Zhiyuan Liu, Zuojian Pan, Haodong Zhang

    Optics letters
    |March 13, 2026
    PubMed
    概括

    研究人员使用InGaN批量开发了InGaN珀色微LED,实现了卓越的波长稳定性. 这一突破最大限度地减少了光谱变化,增强了用于显示和通信的微型LED.

    科学领域:

    • 材料科学 材料科学 材料科学
    • 光电学是指光电子产品.
    • 半导体物理 半导体物理

    背景情况:

    • 基于化 (InGaN) 的微型LED具有较长的发射波长,通常由于量子局限的斯特克效应 (QCSE) 而遭受蓝色转移.
    • 这种光谱不稳定性限制了它们在先进的显示技术和可见光通信 (VLC) 中的使用.

    研究的目的:

    • 为制造具有增强波长和色彩稳定的InGaN珀色微LED.
    • 调查使用散装InGaN活性区域作为传统多个量子井 (MQW) 结构的替代方案.

    主要方法:

    • 制造40微米像素大小的InGaN珀色微型LED.
    • 使用厚厚的InGaN膜 (散装InGaN) 作为活性区域,与标准的MQW设计有所不同.
    • 在不同的注入电流密度下,特征是辐射波长的变化.

    主要成果:

    • 在广泛的电流范围 (5μA至5000μA) 中,从618nm到608nm实现了最小的波长转移.
    • 证明了特殊的波长和颜色稳定性,仅在电流的三个数量级上转移10纳米.
    • 大量InGaN活性区域有效地减轻了QCSE诱导的光谱不稳定性.

    结论:

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    • 大量InGaN方法为长波长微型LED的光谱不稳定性提供了可行的解决方案.
    • 这些稳定的微型LED显示出高性能显示和可见光通信应用的巨大潜力.
    • 这项工作为基于InGaN的光电子设备铺平了更加可靠和颜色精确的道路.