Title: Electrochemical growth of ZnO photonic crystals

Authors: Natalia A. Martynova; Shodruz T. Umedov; Leonid S. Lepnev; Dmitry M. Tsymbarenko; Tatyana B. Shatalova; Anastasia V. Grigorieva

Addresses: Department of Materials Science, Lomonosov Moscow State University, Leninskie Gory 1/73, 119991 Moscow, Russia ' Department of Materials Science, Lomonosov Moscow State University, Leninskie Gory 1/73, 119991 Moscow, Russia ' Lebedev Physical Institute, Leninskiy Prospect 53, 119333 Moscow, Russia ' Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia ' Department of Materials Science, Lomonosov Moscow State University, Leninskie Gory 1/73, 119991 Moscow, Russia; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia ' Department of Materials Science, Lomonosov Moscow State University, Leninskie Gory 1/73, 119991 Moscow, Russia; Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia

Abstract: ZnO films have been prepared by cathodic electrodeposition at room temperature using aqueous and non-aqueous zinc acetate electrolytes with a complexing agent for further application in optoelectronic devices. Influence of electrodeposition conditions on homogeneity and continuity of the films is discussed including the role of Trilon B as a complexing agent in grain size decrease and ensure adherence to ITO glass substrates. The annealing temperature has been optimised according to TG-DTA MS and XRD data. All ZnO opals have wurtzite-type structure and morphology of closed-packed round-shaped particles or very thin flakes forming porous sponge-like architecture. ZnO opal films with artificial microporous architecture have been synthesised using a polystyrene opal matrices as templates. Photoluminescence spectra of the ZnO coverages have shown more complex spectra for precipitates sedimented from aqueous baths than from DMSO electrolytes, most likely, because of different characteristic intrinsic defects.

Keywords: Zincite; electrocrystallisation; zinc acetate bath; electrolyte; helator; microstructure; architecture; photonic crystal; inverse opal; transmittance.

DOI: 10.1504/IJNT.2019.106614

International Journal of Nanotechnology, 2019 Vol.16 No.6/7/8/9/10, pp.389 - 407

Published online: 15 Apr 2020 *

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