Controllable electrical properties of metal-doped in2o 3 nanowires for high-performance enhancement-mode transistors

Xuming Zou, Xingqiang Liu, Chunlan Wang, Ying Jiang, Yong Wang, Xiangheng Xiao, Johnny C. Ho, Jinchai Li, Changzhong Jiang, Qihua Xiong, Lei Liao

研究成果: Contribution to journalArticle査読

75 被引用数 (Scopus)

抄録

In recent years, In2O3 nanowires (NWs) have been widely explored in many technological areas due to their excellent electrical and optical properties; however, most of these devices are based on In 2O3 NW field-effect transistors (FETs) operating in the depletion mode, which induces relatively higher power consumption and fancier circuit integration design. Here, n-type enhancement-mode In2O 3 NW FETs are successfully fabricated by doping different metal elements (Mg, Al, and Ga) in the NW channels. Importantly, the resulting threshold voltage can be effectively modulated through varying the metal (Mg, Ga, and Al) content in the NWs. A series of scaling effects in the mobility, transconductance, threshold voltage, and source-drain current with respect to the device channel length are also observed. Specifically, a small gate delay time (0.01 ns) and high on-current density (0.9 mA/μm) are obtained at 300 nm channel length. Furthermore, Mg-doped In2O3 NWs are then employed to fabricate NW parallel array FETs with a high saturation current (0.5 mA), on/off ratio (>109), and field-effect mobility (110 cm 2/V·s), while the subthreshold slope and threshold voltage do not show any significant changes. All of these results indicate the great potency for metal-doped In2O3 NWs used in the low-power, high-performance thin-film transistors.

本文言語英語
ページ(範囲)804-810
ページ数7
ジャーナルACS nano
7
1
DOI
出版ステータス出版済み - 1 22 2013
外部発表はい

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 工学(全般)
  • 物理学および天文学(全般)

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