Jump to main content
Jump to site search


Exploring and suppressing the kink effect of black phosphorus field-effect transistors operating in the saturation regime

Author affiliations

Abstract

With continuous device scaling, avalanche breakdown in two-dimensional (2D) transistors severely degrades device output characteristics and overall reliability. It is highly desirable to understand the origin of such electrical breakdown for exploring high-performance 2D transistors. Here, we report an anomalous increase in the drain currents of black phosphorus (BP)-based transistors operating in the saturation regime. Through the comprehensive investigation of various channel thicknesses, channel lengths and operating temperatures, such novel behavior is attributed to the kink effect originating from impact ionization and the related potential shift inside the channel, which is further confirmed by device numerical simulations. Furthermore, nitrogen plasma treatment is carried out to eliminate the current anomalous increase and suppress the kink effect with improved saturation current. This work not only sheds light on the understanding of carrier transport within BP transistors, but also could open up a new avenue for achieving high-performance and reliable electronic devices based on 2D materials.

Graphical abstract: Exploring and suppressing the kink effect of black phosphorus field-effect transistors operating in the saturation regime

Back to tab navigation

Supplementary files

Publication details

The article was received on 04 Apr 2019, accepted on 01 May 2019 and first published on 02 May 2019


Article type: Paper
DOI: 10.1039/C9NR02907A
Nanoscale, 2019, Advance Article

  •   Request permissions

    Exploring and suppressing the kink effect of black phosphorus field-effect transistors operating in the saturation regime

    Y. Xia, G. Li, B. Jiang, Z. Yang, X. Liu, X. Xiao, D. Flandre, C. Wang, Y. Liu and L. Liao, Nanoscale, 2019, Advance Article , DOI: 10.1039/C9NR02907A

Search articles by author

Spotlight

Advertisements