克服纳米金属和接口中的费米级固定效应
Zih-Chun Su1, Ching-Fuh Lin1,2,3
1Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan.
Nanomaterials (Basel, Switzerland)
|August 12, 2023
概括
研究人员开发了用于中红外探测的新型光探测器,通过使用被动化表面层来克服费米级别的固定. 这项创新提高了响应性,并扩大了光子应用的传感范围.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 光电学是指光电子产品.
背景情况:
- 基于的光探测器为光子学提供了成本效益和CMOS兼容性.
- 将光探测器的响应能力扩展到中红外 (中红外) 范围是一个重大挑战.
- 在金属/接口上,费米级固定和金属诱导间隙状态 (MIGS) 阻碍了中红外性能.
研究的目的:
- 为了减轻基光探测器中的费米级固定,以提高中红外响应度.
- 为了证明被动化表面层在金属绝缘体半导体 (MIS) 接触器中的有效性.
- 为了提高Schottky探测器的性能,用于更广泛的波长检测.
主要方法:
- 使用被动化半导体表面层制造金属绝缘体半导体 (MIS) 结构.
- 使用绝缘层减轻金属/半导体接口上的费米级固定效应.
- 整个中红外光谱的光探测器响应和检测能力的表征.
主要成果:
- 通过移除费米级定针,成功地将斯科特基屏障高度降低了12.5%至16%.
- 实现了高响应度:在2μm时达到234μA/W,在3μm时达到48.2μA/W,在6μm时达到1.75μA/W.
- 获得的高检测度: 1.17 × 10^8 厘米Hz^(1/2) W^(-1) 在 2 微米和 2.41 × 10^7 厘米Hz^(1/2) W^(-1) 在 3 微米.
结论:
- 被动化表面层有效地减轻了光探测器中的费米级固定.
- 开发的MIS光探测器在中红外范围显著提高了响应和检测能力.
- 这一进步为未来的应用扩大了光子平台的传感能力.
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