Xia Xiaolu, Zhou Shaoyuan, Wang Ying, Zhang Zhiyong
Key Laboratory of Luminescence & Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, China.
Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-Based Electronics, School of Electronics, Peking University, Beijing 100871, China.
Fundam Res. 2023 Nov 21;5(3):1153-1168. doi: 10.1016/j.fmre.2023.11.001. eCollection 2025 May.
Photodetectors are the fundamental building blocks for many optoelectronic systems, including night vision, optical communications, biomedical imaging, security and motion detection. Carbon nanotubes (CNTs), which have a direct-bandgap structure, a broad spectral response and a large absorption coefficient, provide an ideal research platform for the exploration of high-performance infrared photodetectors. In the past twenty years, great efforts have been devoted to improve detection sensitivity via adopting high-purity CNT films, various doping strategies, optical manipulations and sensitizing nanostructures. Despite considerable strides made, challenges remain in simultaneously achieving high responsivity, low dark current and fast response. In this Review, we summarize recent advances on key device construction strategies and underlying concepts that contribute to improve performance of fabricated CNT photodetectors. The newly emerging heterojunction gated CNT transistors and their potential are highlighted to overcome trade-offs between the optical and electronic processes. Novel applications of CNT photodetectors are further summarized for advanced optoelectronic technologies.
光电探测器是许多光电子系统的基本组成部分，包括夜视、光通信、生物医学成像、安全和运动检测。碳纳米管（CNT）具有直接带隙结构、宽光谱响应和大吸收系数，为探索高性能红外光电探测器提供了理想的研究平台。在过去二十年中，人们通过采用高纯度碳纳米管薄膜、各种掺杂策略、光学操控和敏化纳米结构等方法，致力于提高探测灵敏度。尽管取得了长足的进步，但在同时实现高响应度、低暗电流和快速响应方面仍面临挑战。在本综述中，我们总结了有助于提高所制备碳纳米管光电探测器性能的关键器件构建策略和基本概念的最新进展。重点介绍了新出现的异质结栅控碳纳米管晶体管及其潜力，以克服光学和电子过程之间的权衡。还进一步总结了碳纳米管光电探测器在先进光电子技术中的新应用。
