Determination of the optical gap bowing parameter for ternary Ni 1−x Zn x O cubic rocksalt solid solutions

The lattice parameter variation for phase pure cubic rocksalt (RS) Ni 1−x Zn x O 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 Ni 1−x Zn x O. The optical gap bowi...

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Published inDalton transactions : an international journal of inorganic chemistry Vol. 44; no. 33; pp. 14793 - 14798
Main Authors Singh, S. D., Nandanwar, V., Srivastava, Himanshu, Yadav, A. K., Bhakar, Ashok, Sagdeo, P. R., Sinha, A. K., Ganguli, Tapas
Format Journal Article
LanguageEnglish
Published 2015
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Summary:The lattice parameter variation for phase pure cubic rocksalt (RS) Ni 1−x Zn x O 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 Ni 1−x Zn x O. The optical gap bowing parameter for RS Ni 1−x Zn x O 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 Ni 1−x Zn x O solid solutions.
ISSN:1477-9226
1477-9234
DOI:10.1039/C5DT02283E