多个量子井周期对扩展短波红外LED结构性质和性能的影响
Phuc Dinh Nguyen1,2,3, Minkyeong Kim1,4, Yeongho Kim5
1Division of Interdisciplinary Materials Measurement Institute, Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea.
Heliyon
|February 9, 2024
概括
这项研究探讨了短波长红外LED中的量子井周期,发现15个周期优化了电解发光强度. 由于电影质量下降,更长的时间减少了强度.
科学领域:
- 光电学是指光电子产品.
- 半导体设备 半导体设备
- 材料科学 材料科学 材料科学
背景情况:
- 扩展短波红外 (SWIR) 发光二极管 (LED) 对各种应用至关重要.
- 优化量子井结构是提高LED性能的关键.
研究的目的:
- 为了研究多个量子井周期对SWIR InGaAs/InAsPSb I型LED的影响.
- 分析结构性质和设备性能,涉及不同的量子井数.
主要方法:
- 制造具有6,15和30量子井周期的LED.
- 利用理论模拟和实验性表征.
- 进行了温度依赖的暗电流和电光发光分析.
主要成果:
- 通过调整InAsPSb组合,实现了高价值 (350 meV) 和导电 (94 meV) 带偏移.
- 证明了很高的物质放松 (94-96%).
- 确定了发电再组合和陷辅助道作为主要的暗电流机制,后者在低电流时普遍存在.
- 观察到局部和自由刺激子辐射重组作为主要发射源,其中30个量子井显示了最高的局部刺激子贡献.
- 排放强度从6个量子井增加到15个量子井,但由于表轴质量下降,在30个量子井下降.
结论:
- 量子井周期的数量显著影响SWIR LED的性能.
- 15个量子井周期代表了在这种材料系统中最大化电解发光强度的最佳结构.
- 量子井周期超过15的进一步增加可能会由于表轴质量降低而降低设备性能.
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