κ/β-Ga2O3 类型二相异质连接
Yi Lu1, Patsy A Miranda Cortez1, Xiao Tang1
1Advanced Semiconductor Laboratory, Electrical and Computer Engineering Program, Division of Computer, Electrical, and Mathematical Sciences and Engineering (CEMSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia.
Advanced materials (Deerfield Beach, Fla.)
|January 14, 2025
概括
研究人员创建了一个新的氧化相异质连接与II型带对齐. 这一进步显著提高了深紫外光探测器的性能,为新型电子设备铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 半导体设备 半导体设备
背景情况:
- 超宽带间隙氧化物 (Ga2O3) 对太阳盲光子学和高功率电子学至关重要.
- 不同的Ga2O3多态体之间的带对齐由于制造方面的挑战,人们对其了解甚少.
- 不同阶段的异质连接可以表现出独特的带偏移,尽管它们具有相似的固体几何.
研究的目的:
- 实验性地证明不同氧化相之间的异质连接 (β-Ga2O3/κ-Ga2O3).
- 为了研究这种新型相异质连接的带对齐和接口特性.
- 根据这种异质连接来评估基于深紫外线 (DUV) 应用的光电探测器的性能.
主要方法:
- 一个β-Ga2O3/κ-Ga2O3堆叠相异质连接的制造.
- 使用电气和光学测量对异质连接接口和带对齐的表征.
- 使用裸体β-Ga2O3, κ-Ga2O3,以及相异质连接的光探测器的制造和测试.
主要成果:
- 成功证明了具有尖接口的β-Ga2O3/κ-Ga2O3相异质连接.
- 发现了前所未有的II型带对齐,带有显著的带偏移 (≈0.65 eV/0.71 eV).
- 阶段异联光检测器显示响应率增加了3个数量级,在没有外部偏差的DUV照明下响应时间得到了改善.
结论:
- β-Ga2O3/κ-Ga2O3相异质连接显示了适合自动供电的DUV检测的II型频段对齐.
- 观察到的高响应率和快速响应时间证实了强大的界面电场,有利于电子孔分离.
- 这项工作为基于超宽带间隙半导体的先进电子和光子设备中利用相异质连接开辟了新的途径.
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