Journal of Radio Electronics. eISSN 1684-1719. 2024. ¹9
Full text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2024.9.9
Evaluation of the optoelectronic properties
of filamentary titanium oxide with different phase compositions
Yu.O. Vasilevskaya 1,2, M.A. Saurov 1,2, A.P. Orlov 3,4, M.D. Kruzhalina 1, R.T. Sibatov 1,2
1 MIET 124498, Moscow, Zelenograd, Shokin Sq., bld. 1
2 SMC «Technological Centre» 124498, Moscow, Zelenograd, Shokin Sq., bld. 7
3 Kotelnikov IRE RAS 125009, Moscow, Mokhovaya str., 11, b. 7
4 INME RAS 119334, Moscow, Nagatinskaya str., 16A, b. 11.
The paper was received October 3, 2024.
Abstract. The work focuses on the investigation of optoelectronic properties of filamentary titanium oxide with various phase compositions. The experimental samples are two-terminal planar structures based on a thermally oxidized silicon substrate, with gold electrodes spaced approximately 2 micron apart, and deposited there titanium oxide of different phases (containing varying amounts of anatase, rutile, and B-phase). Optical spectra of the titanium oxide were measured over a wide wavelength range from 200 to 1100 nm. The values of the band gap width for the studied titanium oxide samples were determined, and the photoresponses of the resulting structures under ultraviolet illumination were investigated. The law of extended exponent (Kohlrausch function) accurately describes the relaxation kinetics of photocurrent generated after irradiation in all samples studied. Kohlrausch's law is typical for systems with a high degree of energy disorder, characterized by a variety of localized states with different activation energies. The parameters of the photoconductivity relaxation law are determined for samples with different phase compositions.
Key words: titanium oxide, hydrothermal synthesis, photoresponse, Kohlrausch function.
Financing: The work was carried out as part of the development program of the National Research University MIET with the state support program for universities of the Russian Federation «Priority-2030» of the national project «Science and Universities»
Corresponding author: Vasilevskaya Yulia Olegovna, fedorovauo@mail.ru
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For citation:
Vasilevskaya Yu.O., Saurov M.A., Orlov A.P., Kruzhalina M.D., Sibatov R.T. Evaluation of the optoelectronic properties of filamentary titanium oxide with different phase compositions. // Journal of Radio Electronics. – 2024. – ¹. 9. https://doi.org/10.30898/1684-1719.2024.9.9 (In Russian)