基于微区扫描光电流谱技术的微纳光电器件表面和界面特性研究

项目名称： 基于微区扫描光电流谱技术的微纳光电器件表面和界面特性研究

项目编号： No.51502337

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 刘军库

作者单位： 中国空间技术研究院

项目金额： 20万元

中文摘要： 基于纳米材料的微纳光电器件具有体积小、质量轻、对电磁相互作用敏感等特点，是未来高性能光电探测器研究的主要方向之一。但同时，纳米材料具有比表面积大、表面活性高等特点，器件性能受表面和界面特性的影响大，导致对器件光电转换机理、光生载流子传输特性理解不清楚。因此本项目采用微区扫描光电流谱技术，分别以碳纳米管、石墨烯、黑磷为代表，从空间分辨和时间分辨两个方面，系统的研究基于这些纳米材料的器件表面局域光电转换特性、及光生载流子在不同界面的传输特性，从微观尺度揭示器件的光电转换机理、光生载流子传输特性及低维纳米材料中的光生载流子与电极中电子的耦合特性，从而为开发高性能的微纳光电探测器提供理论指导和技术支持。

中文关键词： 微纳器件；微区扫描光电流谱；界面

英文摘要： Micro- and Nano-photoelectric devices based on nanomaterials offer several advantages, such as small, light and sensitive to electromagnetic interaction, which will be one of the most important research field for realizing high performance photodetector. While the high ratio surface area and high surface activity make devices performance depends on the properties of surface and interface. Therefore, in order to understand the intrinsic photoresponse mechanism and carrier transport properties, we should research the photoelectric properties of surface and interface. This research project aims to research the properties of surface and interface in Micro- and Nano-photoelectric devices based on carbon nanotube, graphene and black phosphorus using scanning photocurrent microscopy (SPCM). SPCM will show local photoresponse, photo-generated carrier transport properties and dynamic. Based on these research, we expect to understand the intrinsic photoresponse mechanism, the carrier transport properties through interface and the coupling between the photo-generated carrier from nanomaterial and the electron in electrode. Our research will provide theoretical and technical bases for developing high performance Micro- and Nano-photodetector.

英文关键词： Micro- and Nano-device ;scanning photocurrent microscopy;interface