Issue 33, 2015

Determination of the optical gap bowing parameter for ternary Ni1−xZnxO cubic rocksalt solid solutions

Abstract

The lattice parameter variation for phase pure cubic rocksalt (RS) Ni1−xZnxO ternary solid solutions is observed to be perfectly governed by Vegard's law. X-ray absorption near edge spectroscopy confirms the RS symmetry of Zn atoms in the cubic lattice of Ni1−xZnxO. The optical gap bowing parameter for RS Ni1−xZnxO ternary solid solutions is determined, using diffuse reflectivity, to be −0.93 ± 0.05 eV. The negative value of the bowing indicates a repulsive interaction between the ligand O-2p and the metal Ni-3d orbitals. The determined value of the bowing parameter can be useful in designing UV photodetectors based on Ni1−xZnxO solid solutions.

Graphical abstract: Determination of the optical gap bowing parameter for ternary Ni1−xZnxO cubic rocksalt solid solutions

Article information

Article type
Paper
Submitted
16 Jun 2015
Accepted
15 Jul 2015
First published
16 Jul 2015

Dalton Trans., 2015,44, 14793-14798

Determination of the optical gap bowing parameter for ternary Ni1−xZnxO cubic rocksalt solid solutions

S. D. Singh, V. Nandanwar, H. Srivastava, A. K. Yadav, A. Bhakar, P. R. Sagdeo, A. K. Sinha and T. Ganguli, Dalton Trans., 2015, 44, 14793 DOI: 10.1039/C5DT02283E

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