Investigation of structured green-band emission and electron-phonon interactions in vertically aligned ZnO nanowires

Rui Chen, Yeeyan Tay, Jun Ye, Yang Zhao, Guozhong Xing, Tao Wu, Handong Sun*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We have investigated the green band (GB) emission from vertically aligned ZnO nanowires (NWs) prepared by vapor-liquid-solid growth technique. At low temperatures, the GB emission consists of two sets of zero phonon lines and their phonon replicas independent of the laser excitation power. Temperature-dependent photoluminescence (PL) measurement is performed at temperatures from 10 to 300 K, and the thermal evolution of peak widths and the origin of PL quenching at high temperatures are discussed in detail. The multimode Brownian oscillator model is adopted to reproduce the structured GB and to determine the Huang-Rhys factor. It is found that the two electronic transitions are strongly coupled to different LO phonon modes, and the size-dependent electron-phonon coupling strength is examined.

Original languageEnglish (US)
Pages (from-to)17889-17893
Number of pages5
JournalJournal of Physical Chemistry C
Volume114
Issue number41
DOIs
StatePublished - Oct 21 2010

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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