Tunable Photoinduced Carrier Transport of a Black Phosphorus Transistor with Extended Stability Using a Light-Sensitized Encapsulated Layer

Po Hsun Ho, Min Ken Li, Raman Sankar, Fu Yu Shih, Shao Sian Li, Yih Ren Chang, Wei Hua Wang, Fang Cheng Chou, Chun Wei Chen

研究成果: 雜誌貢獻文章同行評審

15 引文 斯高帕斯(Scopus)

摘要

In this article, we propose a novel approach to demonstrate tunable photoinduced carrier transport of a few-layered black phosphorus (BP) field-effect transistor (FET) with extended air stability using a "light-sensitized ultrathin encapsulated layer". Titanium suboxide (TiOx) ultrathin film (approximately 3 nm), which is an amorphous phase of crystalline TiO2 and can be solution processed, simultaneously exhibits the unique dual functions of passivation and photoinduced doping on a BP FET. The photoinduced electron transfer at TiOx/BP interfaces provides tunable n-Type doping on BP through light illumination. Accordingly, the intrinsic hole-dominated transport of BP can be gradually tuned to the electron-dominated transport at a TiOx/BP FET using light modulation, with enhanced electron mobility and extended air stability of the device. The novel device structure consisting of a light-sensitized encapsulated layer with controllable and reversible doping through light illumination on BP exhibits great potential for the future development of stable BP-based semiconductor logic devices or optoelectronic devices.
原文英語
頁(從 - 到)1102-1108
頁數7
期刊ACS Photonics
3
發行號6
DOIs
出版狀態已發佈 - 六月 15 2016
對外發佈Yes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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