Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (6): 20220113.doi: 10.7503/cjcu20220113

• Physical Chemistry • Previous Articles     Next Articles

Experimental Optimization and Theoretical Simulation of High Performance Field-effect Transistors Based on Multilayer Tungsten Diselenide

ZHANG Yichao1, ZHAO Fulai1(), WANG Yu1, WANG Yaling1, SHEN Yongtao1,2, FENG Yiyu1,2, FENG Wei1,2()   

  1. 1.School of Materials Science and Engineering,Tianjin University,Tianjin 300354,China
    2.Key Laboratory of Advanced Ceramics and Processing Technology,Ministry of Education,Tianjin University,Tianjin 300072,China
  • Received:2022-02-25 Online:2022-06-10 Published:2022-04-10
  • Contact: ZHAO Fulai,FENG Wei E-mail:ialufhz@163.com;weifeng@tju.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(52103093);the China Postdoctoral Science Foundation(2021M702424)

Abstract:

The field-effect transistors(FETs) were prepared based on high-quality WSe2 nanosheets of different thicknesses by mechanical exfoliation method and the influencing factors of their performance were investigated. By regulating the WSe2 nanosheet and dielectric layer substrate thickness, testing temperature, annealing treatment, combined with theoretical simulation analysis, the best electrical performance of WSe2-FETs was obtained. Finally, the obtained 7-layer WSe2 nanosheets exhibit the most excellent electrical properties with carrier mobility up to 93.17 cm2·V?1·s?1 at room temperature and 482.78 cm2·V?1·s?1 at low temperature of 78 K.

Key words: Mechanical exfoliation method, Two-dimensional material, Two-dimensional transition metal dichalcogenide, Carrier mobility, On/off ratio

CLC Number: 

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