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

Document Type

Article

Publication Date

11-6-2015

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.

Identifier

84949478508 (Scopus)

Publication Title

Inorganic Chemistry

External Full Text Location

https://doi.org/10.1021/acs.inorgchem.5b01605

e-ISSN

1520510X

ISSN

00201669

First Page

11226

Last Page

11235

Issue

23

Volume

54

Grant

DE-AC02-06CH11357

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