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Please use this identifier to cite or link to this item: https://elib.bsu.by/handle/123456789/263948
Title: Electrical and optical properties of SiO2 thin layers implanted with Zn ions
Authors: Czarnacka, K.
Koltunowicz, T.N.
Makhavikou, M.
Parkhomenko, I.
Komarov, F.F.
Issue Date: 2019
Publisher: Polish Academy of Sciences
Citation: Acta Phys Pol A 2019;136(2):274-277.
Abstract: This paper presents the results of electrical and optical measurements of 600 nm thick silicon dioxide on Si layers to which zinc ions have been implanted. Following ion implantation the samples were annealed in air at 1023 K for 2 h. For the samples immediately after preparation and being annealed, AC measurements of resistivity Rp, phase angle θ , capacity Cp, and dielectric loss factor tanθ were made as a function of frequency (measurement range 50 Hz-5 MHz) and the measurement temperature (20 K-375 K). On this basis, the frequency-temperature dependence of conductivity δ was prepared. The strong frequency dependence of conductivity indicates that in the Zn/SiO2 layer after annealing, the conductivity takes place by hopping exchange (tunneling) of electrons between nanoparticles of the Zn metallic phase or between ZnO. Moreover, there is a clear change in the nature of conductivity at high frequencies. The photoluminescence spectra of the as-implanted Zn-SiO2-nanocomposites exhibit a blue-green band. This band is caused by the formation of oxygen vacancies in silicon dioxide. The intensity of this peak is observed to grow with the increasing annealing temperature. Besides, a strong orange-red band was revealed in the photoluminescence spectra of the annealed sample. This emission may be attributed to the presence of oxygen interstitial/antisites. The effect of thermal annealing on light-emitting properties has been discussed.
URI: https://elib.bsu.by/handle/123456789/263948
Scopus: 10.12693/APhysPolA.136.274
metadata.dc.identifier.scopus: 85074541677
Sponsorship: Polish Ministry of Science and Higher Education as a statute task of the Lublin University of Technology, the Faculty of Electrical Engineering and Computer Science, 8620/E-361/S/2018 (S-28/E/2018), entitled “Research of electrical, magnetic, thermal and mechanical properties of modern electrotechnical and electronic materials, including nanomaterials and electrical devices and their components, for determination of suitability for use in electrical engineering and to increase the efficiency of energy management”.
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