AlGaN 极化超薄道交叉点 深紫外线发光二极管
Ziqi Zhang1, Shengjun Zhou1, Zhefu Liao1
1Center for Photonics and Semiconductors, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
Nano letters
|February 5, 2025
概括
研究人员开发了一种透明的AlGaN极化超薄道结 (PUTJ) 来改进深紫外线发光二极管 (DUV-LED). 这种新的设计大大降低了光学和电气损耗,实现了DUV-LED的创纪录的低工作电压.
科学领域:
- 光电学是指光电子产品.
- 材料科学 材料科学 材料科学
- 半导体物理 半导体物理
背景情况:
- 深紫外发光二极管 (DUV-LED) 面临着光学损失和高工作电压的挑战.
- 这些问题源于p接触层,包括p-GaN的光吸收和p-AlGaN的差孔注入,这是由于高受体电离能和基于AlGaN的道结 (TJ) 具有高散装阻力.
研究的目的:
- 引入创新的透明AlGaN极化超薄道结 (PUTJ),以克服当前DUV-LED的局限性.
- 为了提高孔注射效率,并减少DUV-LED的p接触层中的电气和光学损失.
主要方法:
- 设计和制造了一种新的透明AlGaN极化超薄道结 (PUTJ).
- PUTJ具有超薄的p和n区域 (20纳米) 和使用偏振电场的内在AlGaN介层.
- 将PUTJ集成到一个273nm的DUV-LED设备中.
主要成果:
- 在道交叉点实现显著降低散装阻力.
- 由于其较小的厚度,PUTJ设计最大限度地减少了光学吸收损失.
- 对于273nm的DUV-LED,在30A/cm2时显示了5.8V的创纪录的低工作电压.
结论:
- 透明的AlGaN PUTJ有效地增强了穿孔的跨带道注入.
- 这一进步导致DUV-LED的光学和电气损耗大幅减少.
- 开发的PUTJ技术代表了向高效的III-化物光电子和DUV光源迈出的重要一步.
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