晶圆结合的AlGaInP红色LED,通过表面硫化抑制S滴
Je-Sung Lee1, Seung-Hyun Mun1, Sunwoo Shin1
1Department of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
ACS applied materials & interfaces
|January 30, 2026
概括
使用硫化进行表面硫化,通过修复侧墙损坏,显著提高了微型发光二极管 (微型LED) 的效率. 这种方法提高了外部量子效率 (EQE),并减少了小像素中的效率下降.
科学领域:
- 半导体设备物理学 半导体设备物理
- 材料科学是一种材料科学.
- 光电学是指光电子产品.
背景情况:
- 微型发光二极管 (micro-LED) 显示器需要高像素密度,通过微型LED结构实现.
- 较小的微型LED由于蚀刻造成的表面缺陷,增加非辐射重组和泄漏,因此遭受效率损失 (大小效应或S-droop).
- 化学被动化,像硫化处理一样,用于,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,.
研究的目的:
- 为了研究硫化表面硫化对晶圆结合的垂直AlGaInPLED用于上发光二极管 (LEDoS) 集成的更广泛的影响.
- 阐明硫化被动化背后的化学机制及其对表面缺陷和电气性能的影响.
- 量化使用硫化处理的微LED的效率提高和S-drop减少.
主要方法:
- 与LEDoS兼容的晶圆结合垂直AlGaInPLED结构的制造.
- 硫化表面硫化处理的应用.
- 使用能量分散光谱 (EDS) 和X射线光电子光谱 (XPS) 的化学分析.
- 电气表征以分离并行电阻和连续电阻.
主要成果:
- 表面硫化用稳定的硫桥键取代了缺陷,解开了费米水平.
- 分析揭示了硫化对顶部和侧墙接口的影响.
- 最大外部量子效率 (EQE) 在10微米像素的5A/cm2时增加了120.6%.
- 观察到S-droop的显著减少.
结论:
- 硫化表面硫化是一种有效的方法,可以减轻表面缺陷,提高AlGaInP微型LED的效率.
- 该研究阐明了被动化机制,涉及硫桥键形成和费米水平解.
- 这种技术为高级显示应用 (包括LEDoS) 提供了一条改善微型LED性能的途径.
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