Nano Research

, Volume 4, Issue 4, pp 343–359

Photoluminescence of CdSe nanowires grown with and without metal catalyst

Authors

  • Andrea Fasoli
    • Department of EngineeringUniversity of Cambridge
  • Alan Colli
    • Nokia Research Centre
  • Faustino Martelli
    • Istituto per la Microelettronica e i Microsistemi del CNR
  • Simone Pisana
    • Department of EngineeringUniversity of Cambridge
  • Ping Heng Tan
    • SKLSM, Institute of SemiconductorsChinese Academy of Sciences
    • Department of EngineeringUniversity of Cambridge
Research Article

DOI: 10.1007/s12274-010-0089-2

Cite this article as:
Fasoli, A., Colli, A., Martelli, F. et al. Nano Res. (2011) 4: 343. doi:10.1007/s12274-010-0089-2

Abstract

We present temperature and power dependent photoluminescence measurements on CdSe nanowires synthesized via vapor-phase with and without the use of a metal catalyst. Nanowires produced without a catalyst can be optimized to yield higher quantum efficiency, and narrower and spatially uniform emission, when compared to the catalyst-assisted ones. Emission at energies lower than the band-edge is also found in both cases. By combining spatially-resolved photoluminescence and electron microscopy on the same nanowires, we show that catalyst-free nanowires exhibit a low-energy peak with sharp phonon replica, whereas for catalyst-assisted nanowires low-energy emission is linked to the presence of nanostructures with extended morphological defects.
https://static-content.springer.com/image/art%3A10.1007%2Fs12274-010-0089-2/MediaObjects/12274_2010_89_Fig1_HTML.jpg

Keywords

CdSenanowiresphotoluminescence

Supplementary material

12274_2010_89_MOESM1_ESM.pdf (921 kb)
Supplementary material, approximately 340 KB.

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2010