Artem O. Shilov, Sergey S. Savchenko, Alexander S. Vokhmintsev, Andrey V. Chukin, Maksim S. Karabanalov, Maksim I. Vlasov, Ilya A. Weinstein, “Energy gap evaluation in microcrystalline m-HFO<nobr>$_2$</nobr> powder”, J. Sib. Fed. Univ. Math. Phys., 2021, Volume 14, Issue 2,Pages <nobr>224

Energy gap evaluation in microcrystalline m-HFO$_2$ powder

Artem O. Shilov^a, Sergey S. Savchenko^a, Alexander S. Vokhmintsev^a, Andrey V. Chukin^a, Maksim S. Karabanalov^a, Maksim I. Vlasov^ba, Ilya A. Weinstein^ac

^a NANOTECH Centre, Ural Federal University, Yekaterinburg, Russian Federation
^b Institute of High-Temperature Electrochemistryof of the Ural Branch RAS, Yekaterinburg, Russian Federation
^c Institute of Metallurgy of the Ural Branch RAS, Yekaterinburg, Russian Federation

Abstract: In this paper optical properties of microcrystalline HfO$_2$ powder are investigated. X-ray diffraction and Raman spectroscopy were used to determine that the studied samples are in monoclinic phase. Based on the analysis of the diffuse reflectance spectra and applying Kubelka-Munk formalism we evaluated the indirect bandgap value $\mathrm{E}_g = 5.34 \pm 0.05$ eV. The calculated value is in agreement with independent data for HfO$_2$ thin films synthesized by various methods. The paper is based on the materials of the report presented at the first Russian scientific confererence with the participation of the international community "YENISEI PHOTONICS – 2020".

Keywords: hafnium dioxide, diffuse reflectance, absorption edge.

UDC: 538.958

Received: 10.11.2020
Received in revised form: 11.01.2021
Accepted: 20.01.2021

Language: English

DOI: 10.17516/1997-1397-2021-14-2-224-229