title: A highly sensitive, highly transparent, gel-gated MoS2 phototransistor on biodegradable nanopaper.
abstract: Transition metal dichalcogenides hold great promise for a variety of novel electrical, optical and mechanical devices and applications. Among them, molybdenum disulphide (MoS2) is gaining increasing attention as gate dielectrics and semiconductive channels for high-performance field effect transistors. Here we report on the first MoS2 phototransistor built on a flexible, transparent and biodegradable substrate with an electrolyte gate dielectric. We have carried out systematic studies on its electrical and optoelectronic properties. The MoS2 phototransistor exhibited an excellent photoresponsivity of ∼1.5 kA W(-1), about two times higher compared to typical back-gated devices reported in previous studies. The device is highly transparent at the same time with an average optical transmittance of 82%. Successful fabrication of phototransistors on flexible cellulose nanopaper with excellent performance and transparency suggests that it is feasible to achieve an ecofriendly and biodegradable phototransistor with great photoresponsivity, broad spectral range and durable flexibility.
authors.affiliation: State Key Laboratory of Precision Measuring Technology & Instruments, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China. dhzhang@tju.edu.cn.
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.forename: Wenzhong
authors.initials: W
authors.lastname: Bao
authors.forename: Amy
authors.initials: A
authors.lastname: Gong
authors.forename: Tao
authors.initials: T
authors.lastname: Gong
authors.forename: Dakang
authors.initials: D
authors.lastname: Ma
authors.forename: Jiayu
authors.initials: J
authors.lastname: Wan
authors.forename: Jiaqi
authors.initials: J
authors.lastname: Dai
authors.forename: Jeremy N
authors.initials: JN
authors.lastname: Munday
authors.forename: Jr-Hau
authors.initials: JH
authors.lastname: He
authors.forename: Liangbing
authors.initials: L
authors.lastname: Hu
authors.forename: Daihua
authors.initials: D
authors.lastname: Zhang