Contactless Electrical and Structural Characterization of Semiconductor Nanowires with Axially Modulated Doping Profiles

Wuhan Yuan, Gozde Tutuncuoglu, Amar Mohabir, Liping Liu, Leonard C Feldman, Michael A. Filler, Jerry W. Shan

Research output: Contribution to journalArticle

Abstract

Efficient characterization of semiconductor nanowires having complex dopant profiles or heterostructures is critical to fully understand these materials and the devices built from them. Existing electrical characterization techniques are slow and laborious, particularly for multisegment nanowires, and impede the statistical understanding of highly variable samples. Here, it is shown that electro-orientation spectroscopy (EOS)—a high-throughput, noncontact method for statistically characterizing the electrical properties of entire nanowire ensembles—can determine the conductivity and dimensions of two distinct segments in individual Si nanowires with axially encoded dopant profiles. This analysis combines experimental measurements and computational simulations to determine the electrical conductivity of the nominally undoped segment of two-segment Si nanowires, as well as the ratio of the segment lengths. The efficacy of this approach is demonstrated by comparing results generated by EOS with conventional four-point-probe measurements. This work provides new insights into the control and variability of semiconductor nanowires for electronic applications and is a critical first step toward the high-throughput interrogation of complete nanowire-based devices.

Original languageEnglish
Article number1805140
JournalSmall
Volume15
Issue number15
DOIs
Publication statusPublished - Apr 12 2019

Fingerprint

Nanowires
Semiconductors
Doping (additives)
Semiconductor materials
Spectrum Analysis
Throughput
Spectroscopy
Equipment and Supplies
Electric Conductivity
Heterojunctions
Electric properties

Keywords

  • conductivity
  • doping
  • electro-orientation
  • heterostructures
  • nanowires
  • semiconductors
  • variability

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

Cite this

Contactless Electrical and Structural Characterization of Semiconductor Nanowires with Axially Modulated Doping Profiles. / Yuan, Wuhan; Tutuncuoglu, Gozde; Mohabir, Amar; Liu, Liping; Feldman, Leonard C; Filler, Michael A.; Shan, Jerry W.

In: Small, Vol. 15, No. 15, 1805140, 12.04.2019.

Research output: Contribution to journalArticle

Yuan, Wuhan ; Tutuncuoglu, Gozde ; Mohabir, Amar ; Liu, Liping ; Feldman, Leonard C ; Filler, Michael A. ; Shan, Jerry W. / Contactless Electrical and Structural Characterization of Semiconductor Nanowires with Axially Modulated Doping Profiles. In: Small. 2019 ; Vol. 15, No. 15.
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