Flexible Image Sensors with Semiconducting Nanowires for Biomimic Visual Applications
半导体纳米线柔性图像传感器及其在仿生视觉中的应用
Guozhen Shen（沈国震）
ABSRACT
Human eye, as one of the most vulnerable organs, is a complex visual system, which processes vision based on the perception of electromagnetic radiation. Flexible image sensors can mimic the function of human eyes, thus realize many emerging applications including machine vision, short wave infrared surveillance and near infrared medical imaging. Semiconductor nanowires (NWs) with unique geometric structure, good transparency, and excellent electronic/optoelectronic properties, provide many opportunities and capabilities for the application of flexible image sensors.
In this talk, I will introduce the most recent progress of flexible image sensors with semiconducting nanowires as the sensing elements, mainly focusing on our own work. The basic structure and characteristic parameters of flexible nanowire photodetectors were first introduced, followed with the strategies to improve their performance, such as using heterostructures or organic-inorganic hybrid nanostructures to substitute single nanowires, using nanowire arrays to get large-area photodetector arrays. The biomimic visual applications of the flexible images were finally introduced in detail. The talk will then finished with a perspective on future research directions of this instersting area.
眼睛是人和动物最大的感知器官，通过眼睛能够感知外界物体的大小、明暗、颜色、动静等，从而获得对机体生存具有重要意义的各种信息。在人类感知的所有信息当中，至少有80%以上是经过视觉获得的。柔性图像传感器可以模仿人类的眼睛实现对外界信息的感知，具有灵敏度高、柔韧性好、轻薄等特点，在仿生视觉、义眼、健康监控等领域有着重要的应用价值。
近年来，我们致力于探索低维半导体纳米材料在柔性图像传感器中的应用研究，设计并研制了多种结构和功能的柔性器件。本次报告将以我们的相关工作为基础，介绍半导体纳米线图像传感器及其在仿生视觉方面的应用研究进展。报告首先介绍半导体纳米线光电探测器的结构及其基本参数。其次重点介绍提升半导体纳米线光电探测器性能的几种策略。在成功研制高性能光电探测器的基础上，实现了大面积柔性图像传感器阵列。并探索了其在仿生视觉方面的应用展示研究。
BIOGRAPHY
Guozhen Shen is currently a professor and group leader in the Institute of Semiconductors, Chinese Academy of Sciences. He received his Ph.D degree (2003) in Chemistry from University of Science and technology of China. His current research focused on flexible electronics and printable electronics, including transistors, photodetectors, sensors and flexible energy storage and conversion devices. He made great contributions to the development of flexible image sensors for artificial visual systems and flexible sensors for health monitoring. Dr. Shen has published more than 300 papers in international referred journals with an h-factor of 76. He edited 2 books on flexible electronics and nanowire electronics. Dr. Shen is the recipient of the NSFC Outstanding Young Scholars, 2nd Prize of the Science and Technology Award of Beijing, and the 1st Prize of the Science and Technology Award of C-MRS.
沈国震，中国科学院半导体研究所研究员，国家杰出青年科学基金获得者。长期从事低维半导体材料及相关柔性电子器件的研究，在面向智能机器人视觉的柔性图像传感器、面向医疗健康应用的柔性传感器等方面取得了原创性的研究成果。发表SCI收录论文300余篇，获引用超过2万次，H-index为76。主编柔性电子学、纳米线电子学英文专著2部，获批申请发明专利十余项。以第一完成人身份获北京市科学技术二等奖、中国材料研究学会科学技术一等奖等。现任英国皇家化学会会士、中国材料研究学会理事。