An infrared photothermoelectric detector enabled by MXene and PEDOT:PSS composite for noncontact fingertip tracking  

作　　者：Jiaqi Wang Zhemiao Xie Guanxuan Lu Jiayu Alexander Liu John T.W.Yeow 

机构地区：[1]Advanced Micro-/Nano-Devices Lab,Department of Systems Design Engineering,University of Waterloo,200 University Ave West,Waterloo,ON,N2L 3G1,Canada

出　　处：《Microsystems & Nanoengineering》2023年第1期229-239,共11页微系统与纳米工程（英文）

基　　金：funded by the Natural Sciences and Engineering Research Council of Canada and Huawei Technologies Canada Co.,Ltd.;funding from the CMC Microsystems-MNT program (project numbers:9328 and 9740).

摘　　要：Photothermoelectric(PTE)detectors functioning on the infrared spectrum show much potential for use in many fields,such as energy harvesting,nondestructive monitoring,and imaging fields.Recent advances in low-dimensional and semiconductor materials research have facilitated new opportunities for PTE detectors to be applied in material and structural design.However,these materials applied in PTE detectors face some challenges,such as unstable properties,high infrared reflection,and miniaturization issues.Herein,we report our fabrication of scalable bias-free PTE detectors based on Ti3C2 and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate(PEDOT:PSS)composites and characterization of their composite morphology and broadband photoresponse.We also discuss various PTE engineering strategies,including substrate choices,electrode types,deposition methods,and vacuum conditions.Furthermore,we simulate metamaterials using different materials and hole sizes and fabricated a gold metamaterial with a bottom-up configuration by simultaneously combining MXene and polymer,which achieved an infrared photoresponse enhancement.Finally,we demonstrate a fingertip gesture response using the metamaterial-integrated PTE detector.This research proposes numerous implications of MXene and its related composites for wearable devices and Internet of Things(IoT)applications,such as the continuous biomedical tracking of human health conditions.

关 键 词：UNSTABLE COMPOSITE SIZES 

分 类 号：TN215[电子电信—物理电子学]