Blue shift in absorption edge of polycrystalline zinc oxide modified by nanoparticles before and after irradiation exposure

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2018-03, Vol.418, p.18-26
• Main Authors: Mikhailov, M.M., Neshchimenko, V.V., Li, C., Vlasov, V.A.
• Format: Article
• Language: English
• Subjects: Band gap; Crystal structure; Irradiation; Nanoparticles; Optical properties; Zinc oxide
• ISSN: 0168-583X; 1872-9584
• DOI: 10.1016/j.nimb.2017.12.015

•Zinc oxide powders modified by nanopowders ZrO2, Al2O3, TiO2, SiO2, CeO2, Y2O3.•Studied the effect of modification on the zinc oxide band gap after irradiation by p+ and e−.•The modification are formed the solid solutions between zinc oxide and nanopowder.•Irradiation by 100 keV p+ result in blue shift in absorption edge of ZnO modified by nanoparticles. The effect on band gap (Eg) and crystal structure of ZnO modified by Al2O3, ZrO2, SiO2, CeO2, TiO2 and Y2O3 nanoparticles at concentrations less than 30 wt% has been investigated. Established that change of Eg reach to 0.03 eV and determined by charge of cations and their radius, as well as the concentration of the nanoparticles. Lattice parameters changes at modifying by nanoparticles with a smaller and larger radius of cations than the ion Zn2+. Influence of 100 keV protons irradiation result in blue shift in absorption edge of polycrystalline zinc oxide modified by Al2O3, ZrO2, SiO2, CeO2, TiO2 and Y2O3 nanoparticles.