Average and Local Crystal Structures of (Ga1-xZnx)(N1-xOx) Solid Solution Nanoparticles

Mikhail Feygenson, Joerg C. Neuefeind, Trevor A. Tyson, Natalie Schieber, Wei Qiang Han

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

We report a comprehensive study of the crystal structure of (Ga1-xZnx)(N1-xOx) solid solution nanoparticles by means of neutron and synchrotron X-ray scattering. In our study, we used four different types of (Ga1-xZnx)(N1-xOx) nanoparticles, with diameters of 10-27 nm and x = 0.075-0.51, which show energy band gaps from 2.21 to 2.61 eV. Rietveld analysis of the neutron diffraction data revealed that the average crystal structure is hexagonal wurtzite (space group P63mc) for the larger nanoparticles, while the crystal structure of smaller nanoparticles is disordered hexagonal. Pair-distribution-function analysis found that the intermediate crystal structure retains a "motif" of the average one; however, the local structure is more disordered. The implications of disorder on the reduced energy band gap are discussed.

Original languageEnglish (US)
Pages (from-to)11226-11235
Number of pages10
JournalInorganic Chemistry
Volume54
Issue number23
DOIs
StatePublished - Nov 6 2015

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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