Luminescence in Anion-Deficient Hafnia Nanotubes
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Luminescence in Anion-Deficient Hafnia Nanotubes
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| Автор |
Shilov, A. O.
Kamalov, R. V. Karabanalov, M. S. Chukin, A. V. Vokhmintsev, A. S. Mikhalevsky, G. B. Zamyatin, D. A. Henaish, A. M. A. Weinstein, I. A. |
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| Тематика |
DIRECT BANDGAP
HAFNIUM DIOXIDE LOW-TEMPERATURE PHOTOLUMINESCENCE MODIFIED TAUC APPROACH NANOTUBES NON-STOICHIOMETRIC HFO2 OXYGEN DEFICIENCY PL DECAY |
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| Описание |
Hafnia-based nanostructures and other high-k dielectrics are promising wide-gap materials for developing new opto- and nanoelectronic devices. They possess a unique combination of physical and chemical properties, such as insensitivity to electrical and optical degradation, radiation damage stability, a high specific surface area, and an increased concentration of the appropriate active electron-hole centers. The present paper aims to investigate the structural, optical, and luminescent properties of anodized non-stoichiometric HfO2 nanotubes. As-grown amorphous hafnia nanotubes and nanotubes annealed at 700 °C with a monoclinic crystal lattice served as samples. It has been shown that the bandgap Eg for direct allowed transitions amounts to 5.65 ± 0.05 eV for amorphous and 5.51 ± 0.05 eV for monoclinic nanotubes. For the first time, we have studied the features of intrinsic cathodoluminescence and photoluminescence in the obtained nanotubular HfO2 structures with an atomic deficiency in the anion sublattice at temperatures of 10 and 300 K. A broad emission band with a maximum of 2.3–2.4 eV has been revealed. We have also conducted an analysis of the kinetic dependencies of the observed photoluminescence for synthesized HfO2 samples in the millisecond range at room temperature. It showed that there are several types of optically active capture and emission centers based on vacancy states in the O3f and O4f positions with different coordination numbers and a varied number of localized charge carriers (V0, V−, and V2−). The uncovered regularities can be used to optimize the functional characteristics of developed-surface luminescent media based on nanotubular and nanoporous modifications of hafnia. © 2023 by the authors.
Russian Science Foundation, RSF: 23-22-00310 This work was supported by the Russian Science Foundation under grant no. 23-22-00310, https://rscf.ru/en/project/23-22-00310/ (accessed on 1 November 2023). |
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| Дата |
2024-04-05T16:38:42Z
2024-04-05T16:38:42Z 2023 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
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| Идентификатор |
Shilov, A, Kamalov, R, Karabanalov, M, Chukin, A, Vokhmintsev, A, Mikhalevsky, G, Zamyatin, D, Henaish, A & Weinstein, I 2023, 'Luminescence in Anion-Deficient Hafnia Nanotubes', Nanomaterials, Том. 13, № 24, 3109. https://doi.org/10.3390/nano13243109
Shilov, A., Kamalov, R., Karabanalov, M., Chukin, A., Vokhmintsev, A., Mikhalevsky, G., Zamyatin, D., Henaish, A., & Weinstein, I. (2023). Luminescence in Anion-Deficient Hafnia Nanotubes. Nanomaterials, 13(24), [3109]. https://doi.org/10.3390/nano13243109 2079-4991 Final All Open Access, Gold, Green https://www.scopus.com/inward/record.uri?eid=2-s2.0-85180716197&doi=10.3390%2fnano13243109&partnerID=40&md5=a52067a463c59305c96329a39a2c6628 https://www.mdpi.com/2079-4991/13/24/3109/pdf?version=1702175725 http://elar.urfu.ru/handle/10995/131086 10.3390/nano13243109 85180716197 001132745500001 |
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| Язык |
en
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| Связанные ресурсы |
info:eu-repo/grantAgreement/RSF//23-22-00310
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| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by https://creativecommons.org/licenses/by/4.0/ |
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| Формат |
application/pdf
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| Издатель |
Multidisciplinary Digital Publishing Institute (MDPI)
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| Источник |
Nanomaterials
Nanomaterials |
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