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A study on ionic gated MoS2 phototransistors

  • Binmin Wu
  • Xudong Wang
  • Hongwei Tang
  • Tie Lin
  • Hong Shen
  • Weida Hu
  • Xiangjian Meng
  • Wenzhong BaoEmail author
  • Jianlu WangEmail author
  • Junhao Chu
Research Paper
  • 6 Downloads

Abstract

Molybdenum disulfide (MoS2) holds great promise in the future applications of nanoelectronics and optoelectronic devices. Exploring those interesting physical properties of MoS2 using a strong electric field provided by electrolyte-gel is a robust approach. Here, we fabricate an MoS2 phototransistor gated by electrolyte-gel which is located on a fused silica substrate. Under the modulation of electrolyte-gel, the Schottky barrier between MoS2 and source/drain electrodes can be widely regulated from 11 to 179 meV. The MoS2 phototransistor exhibits excellent responsivity of 2.68 × 104 A/W and detectivity of 9.6 × 1010 Jones under visible incident light at negative gate voltage modulation. We attribute the optoelectronic performance enhancement to the Schottky barrier modulation of electrolyte-gel gating. It makes the device suitable for applications in high-sensitive photodetectors.

Keywords

MoS2 phototransistor electrolyte-gel gating Schottky barrier electric double layer two-dimensional materials 

Notes

Acknowledgements

This work was partially supported by Major State Basic Research Development Program (Grant Nos. 2016YFB0400801), National Natural Science Foundation of China (Grant Nos. 61722408, 61835012, 51802041), Key Research Project of Frontier Sciences of Chinese Academy of Sciences (Grant Nos. QYZDY-SSW-JSC042, QYZDB-SSW-JSC016), National Postdoctoral Program for Innovative Talents (Grant No. BX20180329), and Shanghai Sailing Program (Grant No. 19YF1454900).

Supplementary material

11432_2019_1472_MOESM1_ESM.pdf (550 kb)
A study on ionic gated MoS2 phototransistors

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Binmin Wu
    • 1
    • 2
    • 4
  • Xudong Wang
    • 1
  • Hongwei Tang
    • 3
  • Tie Lin
    • 1
  • Hong Shen
    • 1
  • Weida Hu
    • 1
  • Xiangjian Meng
    • 1
  • Wenzhong Bao
    • 3
    Email author
  • Jianlu Wang
    • 1
    Email author
  • Junhao Chu
    • 1
    • 2
  1. 1.State Key Laboratory of Infrared Physics, Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghaiChina
  2. 2.School of Physical Science and TechnologyShanghai Tech UniversityShanghaiChina
  3. 3.State Key Laboratory of ASIC and System, School of MicroelectronicsFudan UniversityShanghaiChina
  4. 4.University of Chinese Academy of SciencesBeijingChina

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