Composition variations and UV irradiation effect on charge transfer in PbMoO4 single crystals

Authors

  • T. M. Bochkova Institute for Energy Efficient Technologies and Material Science of Oles Honchar Dnipro National University, Dnipro, Ukraine
  • M. P. Trubitsyn Institute for Energy Efficient Technologies and Material Science of Oles Honchar Dnipro National University, Dnipro, Ukraine
  • M. D. Volnianskii Institute for Energy Efficient Technologies and Material Science of Oles Honchar Dnipro National University, Dnipro, Ukraine
  • D. M. Volnyanskii Ukrainian State University of Science and Technologies, Dnipro, Ukraine

DOI:

https://doi.org/10.15421/332217

Keywords:

lead molybdate PbMoO4, disordered media, hopping conductivity

Abstract

The effect of nonstoichiometry of the composition, PbO polymorphism, and preliminary irradiation with ultraviolet light on electrical conductivity of alternating current (AC) was studied in PbMoO4 crystals. The crystals were grown by Czochralski method in a direction deviated by 30° from a-axis in (001) plain. The charge was prepared from MoO3 and PbO, lead oxide was used of α- or β- structural modifications. The reagents were taken both in a stoichiometric ratio and with an excess of 0.5 mol % of MoO3. It was shown that the magnitude of the dark and irradiation-induced AC conductivity was affected both by the type of polymorphic form of PbO and by the excess amount of MoO3. The influence of the PbMoO4 crystal structural disorder on charge transfer processes are discussed within the framework of the model of hopping conduction in disordered media.

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Published

30-12-2022

Issue

Vol. 30 No. 2 (2022)

Section

Articles