Simulating the obstacle avoidance behavior day and night based on the visible-infrared MoS_(2)/Ge heterojunction field-effect phototransistor  

作　　者：Zhao Han Bo Wang Jie You Qiancui Zhang Yichi Zhang Tian Miao Ningning Zhang Dongdong Lin Zuimin Jiang Renxu Jia Jincheng Zhang Hui Guo Huiyong Hu Liming Wang 

机构地区：[1]Key Laboratory of Analog Integrated Circuits and Systems,Ministry of Education,School of Microelectronics,Xidian University,Xi’an 710071,China [2]Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences,Department of Microelectronic Science and Engineering,Ningbo University,Ningbo 315211,China [3]Department of Physics,Fudan University,Shanghai 200433,China

出　　处：《Nano Research》2023年第8期11296-11302,共7页纳米研究（英文版）

基　　金：supported by the National Natural Science Basic Research Program of Shaanxi(No.2022JQ-650);the Natural Science Foundation of China(NSFC)(No.62204188);the Cooperation Program of XDU-Chongqing IC Innovation Research Institute(No.CQIRI-CXYHT-2022-13)。

摘　　要：The contradiction between the high number of visually handicapped people and the scarcity of guide dogs has stimulated the demand for electronic guide dogs(EGDs).Here,we demonstrate an EGD by leveraging piezoresistors on a MoS_(2)/Ge heterostructure for simultaneous pressure-sensing and optical-sensing functions.The device has excellent gating capability and exhibits large positive and negative photoresponses under visible(532 nm,182 A/W)and infrared(1550 nm,37 A/W)illumination.These characteristics allow the device to efficiently classify different obstacles at all times of day using pressure and light signals.The device reaches nearly 100%accuracy after 48 training sessions when used to classify frequent scenes.The device adopts passive and active detection modes during the day and night,respectively,which improves the battery life of the EGD.This work provides a significant reference for the future design of EGDs,which may help a greater number of visually impaired people by reducing the cost of such devices.

关 键 词：electronic guide dogs dual-band photodetection pressure and light synergy work round the clock 

分 类 号：TN21[电子电信—物理电子学]