Rectifying Single GaAsSb Nanowire Devices Based on Self-Induced Compositional Gradients

Junghwan Huh, Hoyeol Yun, Dong Chul Kim, A. Mazid Munshi, Dasa L. Dheeraj, Hanne Kauko, Antonius T.J. Van Helvoort, Sang Wook Lee, Bjørn Ove Fimland, Helge Weman

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

Device configurations that enable a unidirectional propagation of carriers in a semiconductor are fundamental components for electronic and optoelectronic applications. To realize such devices, however, it is generally required to have complex processes to make p-n or Schottky junctions. Here we report on a unidirectional propagation effect due to a self-induced compositional variation in GaAsSb nanowires (NWs). The individual GaAsSb NWs exhibit a highly reproducible rectifying behavior, where the rectifying direction is determined by the NW growth direction. Combining the results from confocal micro-Raman spectroscopy, electron microscopy, and electrical measurements, the origin of the rectifying behavior is found to be associated with a self-induced variation of the Sb and the carrier concentrations in the NW. To demonstrate the usefulness of these GaAsSb NWs for device applications, NW-based photodetectors and logic circuits have been made. (Graph Presented).

Original languageEnglish
Pages (from-to)3709-3715
Number of pages7
JournalNano Letters
Volume15
Issue number6
DOIs
StatePublished - 10 Jun 2015

Keywords

  • Self-catalyzed GaAsSb nanowires
  • logic circuits
  • molecular beam epitaxy
  • photodetectors
  • rectifying behavior
  • self-induced compositional variation

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