Nano Research

, Volume 10, Issue 1, pp 218–228

Characterization of tin(II) sulfide defects/vacancies and correlation with their photocurrent

  • Mingyang Liu
  • Luqing Wang
  • Linan Zhou
  • Sidong Lei
  • Jarin Joyner
  • Yingchao Yang
  • Robert Vajtai
  • Pulickel Ajayan
  • Boris I. Yakobson
  • Pol Spanos
Research Article

DOI: 10.1007/s12274-016-1279-3

Cite this article as:
Liu, M., Wang, L., Zhou, L. et al. Nano Res. (2017) 10: 218. doi:10.1007/s12274-016-1279-3

Abstract

The presence of defects/vacancies in nanomaterials influences the electronic structure of materials, and thus, it is necessary to study the correlation between the optoelectronic properties of a nanomaterial and its defects/vacancies. Herein, we report a facile solvothermal route to synthesize three-dimensional (3D) SnS nanostructures formed by {131} faceted nanosheet assembly. The 3D SnS nanostructures were calcined at temperatures of 350, 400, and 450 °C and used as counter electrodes, before their photocurrent properties were investigated. First principle computation revealed the photocurrent properties depend on the defect/vacancy concentration within the samples. It is very interesting that characterization with positron annihilation spectrometry confirmed that the density of defects/vacancies increased with the calcination temperature, and a maximum photocurrent was realized after treatment at 400 °C. Further, the defect/vacancy density decreased when the calcination temperature reached 450 °C as the higher calcination temperature enlarged the mesopores and densified the pore walls, which led to a lower photocurrent value at 450 °C than at 400 °C.

Keywords

SnS microspheres mesoporous nanosheet assembly defects/vacancies positron annihilation spectrometry photocurrent 

Supplementary material

12274_2016_1279_MOESM1_ESM.pdf (1.4 mb)
Characterization of tin(II) sulfide defects/vacancies and correlation with their photocurrent

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Mingyang Liu
    • 1
  • Luqing Wang
    • 1
  • Linan Zhou
    • 2
  • Sidong Lei
    • 1
  • Jarin Joyner
    • 2
  • Yingchao Yang
    • 1
  • Robert Vajtai
    • 1
  • Pulickel Ajayan
    • 1
  • Boris I. Yakobson
    • 1
  • Pol Spanos
    • 1
  1. 1.Department of Materials Science and NanoengineeringRice UniversityHoustonUSA
  2. 2.Department of ChemistryRice UniversityHoustonUSA

Personalised recommendations