在门和排水电压压力下的局部波段曲的研究在n-通道在2O3薄膜晶体管中使用硬X射线光电子光谱学运行
Ibrahima Gueye1,2, Akira Yasui2, Yasumasa Takagi2
1National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
ACS applied materials & interfaces
|September 9, 2025
概括
这项研究使用了硬X射线光电子光谱学来分析在操作期间的氧化薄膜晶体管 (In2O3-TFTs). 研究结果揭示了偏差电压如何影响晶体管通道和门,确定氧气空缺作为泄漏电流的关键来源.
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
- 半导体设备物理 半导体设备物理
背景情况:
- 氧化 (In2O3) 是用于薄膜晶体管 (TFT) 的一个有前途的n型半导体.
- 了解电荷传输机制和缺陷状态对于优化In2O3-TFT性能至关重要.
研究的目的:
- 在不同的偏差条件下,研究In2O3-TFT内部的操作电子结构和化学状态.
- 为了阐明排水源泄漏电流 (IDSS) 和载体运输机制的起源.
主要方法:
- 使用基于同步子的硬X射线光电子光谱学 (HAXPES) 进行现场分析.
- 在SiO2/p+-Si基板上检查了一个底门In2O3-TFT与Al2O3门介电器.
- 在测量过程中应用不同的门源 (VGS) 和排水源 (VDS) 电压.
主要成果:
- 在3d核心水平上,绑定能量沿通道转移,与VDS诱导的电位梯度相关.
- VGS极性显著影响通道结构;VDS影响门介电器和电极中的静电潜力.
- 氧气空缺 (VO2+) 被确定为内在电子和陷水平的主要来源,有助于IDSS.
- 在源/排水电极下观察到显著的In2O3减少和金属 (In0) 形成.
结论:
- 操作HAXPES为In2O3-TFT的动态电子结构提供了关键的见解.
- 电极下的氧气空缺和In2O3减少是影响设备性能和泄漏的关键因素.
- 基于实验观测的提议载体运输模型,以改进设备设计.
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