Solution synthesis of ultrathin single-crystalline SNS nanoribbons for photodetectors via phase transition and surface processing

Zhengtao Deng, Di Cao, Jin He, Su Lin, Stuart M. Lindsay, Yan Liu

Research output: Contribution to journalArticle

116 Citations (Scopus)

Abstract

We report the solution-phase synthesis and surface processing of ∼2-5 μm long single-crystalline IV-VI tin(II) sulfide (SnS) ultrathin nanoribbons, with thicknesses down to 10 nm, and their use in single nanoribbon based photodetectors. The SnS nanoribbons grow via a metastable-to-stable phase transition from zinc blende (ZB) nanospheres to orthorhombic nanoribbons; dual-phase intermediate heterostructures with zinc blende nanosphere heads and orthorhombic nanoribbon tails were observed. Exchange of long, insulating organic oleylamine ligands by short, inorganic HS - ligands converts the organic SnS nanoribbons into completely inorganic, hydrophilic structures. Field-effect transistor (FET) devices were made from single SnS nanoribbons, both before and after ligand exchange, which exhibit p-type semiconductor behavior. The SnS single nanoribbon based photodetector devices showed highly sensitive and rapid photocurrent responses to illumination by blue, green, and red light. The switching behavior of photocurrent generation and annihilation is complete within approximately 1 ms and exhibits high photoconductivity gains (up to 2.3 × 10 4) and good stability. The ON/OFF ratio of the photodetector can be engineered to 80 (4 nA/50 pA) using a small drain current (10 mV) for the all inorganic SnS nanoribbons. This work paves the way for the colloidal growth of low-cost, environmentally benign, single-crystalline narrow band gap semiconductor nanostructures from abundant elements for applications in photodetectors and other nanoscale devices.

Original languageEnglish
Pages (from-to)6197-6207
Number of pages11
JournalACS Nano
Volume6
Issue number7
DOIs
Publication statusPublished - Jul 24 2012

Fingerprint

Nanoribbons
Carbon Nanotubes
Photodetectors
photometers
Phase transitions
Crystalline materials
synthesis
Processing
ligands
photocurrents
zinc
p-type semiconductors
Nanospheres
Ligands
photoconductivity
Photocurrents
narrowband
sulfides
tin
field effect transistors

Keywords

  • colloidal nanoribbons
  • field-effect transistors
  • ligand exchange
  • phase transition
  • photodetector
  • tin sulfide

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Solution synthesis of ultrathin single-crystalline SNS nanoribbons for photodetectors via phase transition and surface processing. / Deng, Zhengtao; Cao, Di; He, Jin; Lin, Su; Lindsay, Stuart M.; Liu, Yan.

In: ACS Nano, Vol. 6, No. 7, 24.07.2012, p. 6197-6207.

Research output: Contribution to journalArticle

Deng, Zhengtao ; Cao, Di ; He, Jin ; Lin, Su ; Lindsay, Stuart M. ; Liu, Yan. / Solution synthesis of ultrathin single-crystalline SNS nanoribbons for photodetectors via phase transition and surface processing. In: ACS Nano. 2012 ; Vol. 6, No. 7. pp. 6197-6207.
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