Exciton Luminescence and Optical Properties of Nanocrystalline Cubic Y<sub>2</sub>O<sub>3</sub> Films Prepared by Reactive Magnetron Sputtering
This paper presents a comprehensive study of the energy structure, optical characteristics, and spectral-kinetic parameters of elementary excitations in a high-purity nanocrystalline cubic Y<sub>2</sub>O<sub>3</sub> film synthesized by reactive magnetron sputtering. The optic...
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MDPI AG
2022-08-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/15/2726 |
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| author | Anatoly Zatsepin Yulia Kuznetsova Dmitry Zatsepin Chi-Ho Wong Wing-Cheung Law Chak-Yin Tang Nikolay Gavrilov |
| author_facet | Anatoly Zatsepin Yulia Kuznetsova Dmitry Zatsepin Chi-Ho Wong Wing-Cheung Law Chak-Yin Tang Nikolay Gavrilov |
| author_sort | Anatoly Zatsepin |
| collection | DOAJ |
| description | This paper presents a comprehensive study of the energy structure, optical characteristics, and spectral-kinetic parameters of elementary excitations in a high-purity nanocrystalline cubic Y<sub>2</sub>O<sub>3</sub> film synthesized by reactive magnetron sputtering. The optical transparency gaps for direct and indirect interband transitions were determined and discussed. The dispersion of the refractive index was established based on the analysis of interference effects. It was found that the refractive index of the Y<sub>2</sub>O<sub>3</sub> film synthesized in this study is higher in order of magnitude than that of the films obtained with the help of other technologies. The intrinsic emission of Y<sub>2</sub>O<sub>3</sub> film has been discussed and associated with the triplet–singlet radiative relaxation of self-trapped and bound excitons. We also studied the temperature behavior of the exciton luminescence of Y<sub>2</sub>O<sub>3</sub> for the first time and determined thermal activation barriers. The optical energy and kinetic parameters of cubic Y<sub>2</sub>O<sub>3</sub> films were analyzed in comparison with those of the monoclinic films of yttrium oxide. The main difference between the optical properties of cubic and monoclinic Y<sub>2</sub>O<sub>3</sub> films was established, which allowed for a supposition of their application prospects. |
| first_indexed | 2024-03-09T05:08:34Z |
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| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T05:08:34Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj.art-ea96d6100b7943769a09b6a5b6dcf2892023-12-03T12:52:54ZengMDPI AGNanomaterials2079-49912022-08-011215272610.3390/nano12152726Exciton Luminescence and Optical Properties of Nanocrystalline Cubic Y<sub>2</sub>O<sub>3</sub> Films Prepared by Reactive Magnetron SputteringAnatoly Zatsepin0Yulia Kuznetsova1Dmitry Zatsepin2Chi-Ho Wong3Wing-Cheung Law4Chak-Yin Tang5Nikolay Gavrilov6Institute of Physics and Technology, Ural Federal University, 620075 Ekaterinburg, RussiaInstitute of Physics and Technology, Ural Federal University, 620075 Ekaterinburg, RussiaInstitute of Physics and Technology, Ural Federal University, 620075 Ekaterinburg, RussiaDepartment of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong KongDepartment of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong KongDepartment of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong KongInstitute of Electrophysics, Ural Branch of Russian Academy of Science, 620049 Ekaterinburg, RussiaThis paper presents a comprehensive study of the energy structure, optical characteristics, and spectral-kinetic parameters of elementary excitations in a high-purity nanocrystalline cubic Y<sub>2</sub>O<sub>3</sub> film synthesized by reactive magnetron sputtering. The optical transparency gaps for direct and indirect interband transitions were determined and discussed. The dispersion of the refractive index was established based on the analysis of interference effects. It was found that the refractive index of the Y<sub>2</sub>O<sub>3</sub> film synthesized in this study is higher in order of magnitude than that of the films obtained with the help of other technologies. The intrinsic emission of Y<sub>2</sub>O<sub>3</sub> film has been discussed and associated with the triplet–singlet radiative relaxation of self-trapped and bound excitons. We also studied the temperature behavior of the exciton luminescence of Y<sub>2</sub>O<sub>3</sub> for the first time and determined thermal activation barriers. The optical energy and kinetic parameters of cubic Y<sub>2</sub>O<sub>3</sub> films were analyzed in comparison with those of the monoclinic films of yttrium oxide. The main difference between the optical properties of cubic and monoclinic Y<sub>2</sub>O<sub>3</sub> films was established, which allowed for a supposition of their application prospects.https://www.mdpi.com/2079-4991/12/15/2726nanocrystalline Y<sub>2</sub>O<sub>3</sub> filmsmagnetron sputteringluminescenceexcitonsoptical absorptioninterband transitions |
| spellingShingle | Anatoly Zatsepin Yulia Kuznetsova Dmitry Zatsepin Chi-Ho Wong Wing-Cheung Law Chak-Yin Tang Nikolay Gavrilov Exciton Luminescence and Optical Properties of Nanocrystalline Cubic Y<sub>2</sub>O<sub>3</sub> Films Prepared by Reactive Magnetron Sputtering Nanomaterials nanocrystalline Y<sub>2</sub>O<sub>3</sub> films magnetron sputtering luminescence excitons optical absorption interband transitions |
| title | Exciton Luminescence and Optical Properties of Nanocrystalline Cubic Y<sub>2</sub>O<sub>3</sub> Films Prepared by Reactive Magnetron Sputtering |
| title_full | Exciton Luminescence and Optical Properties of Nanocrystalline Cubic Y<sub>2</sub>O<sub>3</sub> Films Prepared by Reactive Magnetron Sputtering |
| title_fullStr | Exciton Luminescence and Optical Properties of Nanocrystalline Cubic Y<sub>2</sub>O<sub>3</sub> Films Prepared by Reactive Magnetron Sputtering |
| title_full_unstemmed | Exciton Luminescence and Optical Properties of Nanocrystalline Cubic Y<sub>2</sub>O<sub>3</sub> Films Prepared by Reactive Magnetron Sputtering |
| title_short | Exciton Luminescence and Optical Properties of Nanocrystalline Cubic Y<sub>2</sub>O<sub>3</sub> Films Prepared by Reactive Magnetron Sputtering |
| title_sort | exciton luminescence and optical properties of nanocrystalline cubic y sub 2 sub o sub 3 sub films prepared by reactive magnetron sputtering |
| topic | nanocrystalline Y<sub>2</sub>O<sub>3</sub> films magnetron sputtering luminescence excitons optical absorption interband transitions |
| url | https://www.mdpi.com/2079-4991/12/15/2726 |
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