Surface-dominant transport properties in MoSe2 nanosheets

Manickam Anandan, Yu Shin Chang, Chi Yang Chen, Chin Jung Ho, Cheng Maw Cheng, Hung Ru Chen, Tsu Yi Fu, Yu Wen Chu, Kuei Yi Lee, Liang Chiun Chao, Ruei San Chen*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

The electronic transport and photoconduction properties of the molybdenum diselenide (MoSe2) nanosheets were investigated. The transfer length method analysis suggests the electric current following an anomalously two-dimensional (2D) flow rather than the general 3D mode. The 2D current implies a higher electron concentration and downward band bending at the surface. A broad spectral photoresponse from ultraviolet to near-infrared wavelengths was also observed for the MoSe2 nanosheets. The optimal responsivity and photoconductive gain respectively at 58 A/W and 179 under the wavelengths at 405 nm were achieved. A surface-controlled photoconduction mechanism based on the surface band bending and electron accumulation is proposed to explain the long carrier lifetime and its dependence of light intensity and environment in MoSe2 nanostructures.

原文英語
文章編號114988
期刊Physica E: Low-Dimensional Systems and Nanostructures
135
DOIs
出版狀態已發佈 - 2022 一月

ASJC Scopus subject areas

  • 電子、光磁材料
  • 原子與分子物理與光學
  • 凝聚態物理學

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