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| dc.contributor.author | CRISTEA, Ecaterina | |
| dc.contributor.author | STAMOV, Ivan | |
| dc.contributor.author | ZALAMAI, Victor | |
| dc.date.accessioned | 2023-11-03T07:25:27Z | |
| dc.date.available | 2023-11-03T07:25:27Z | |
| dc.date.issued | 2023 | |
| dc.identifier.citation | CRISTEA, Ecaterina, STAMOV, Ivan, ZALAMAI, Victor. Ground and Excited States of Excitons in GaSe Single Crystals. In: 6th International Conference on Nanotechnologies and Biomedical Engineering: proc. of ICNBME-2023, 20–23, 2023, Chisinau, vol. 1: Nanotechnologies and Nano-biomaterials for Applications in Medicine, 2023, p. 166-173. ISBN 978-3-031-42774-9. e-ISBN 978-3-031-42775-6. | en_US |
| dc.identifier.isbn | 978-3-031-42774-9 | |
| dc.identifier.isbn | 978-3-031-42775-6 | |
| dc.identifier.uri | https://doi.org/10.1007/978-3-031-42775-6_18 | |
| dc.identifier.uri | http://repository.utm.md/handle/5014/24622 | |
| dc.description | Acces full text - https://doi.org/10.1007/978-3-031-42775-6_18 | en_US |
| dc.description.abstract | In this work photoluminescence, reflection and absorption spectra of GaSe single crystals were studied in a wide temperature range (10 – 300 K). The presence of series of excitonic levels in the region E > Eg was shown. At excitation by 448 nm laser of GaSe crystal electrons were resonantly excited from V1(Γ1) band to C1(Γ6) and C2(Γ5) bands. The luminescence from excitonic levels (nA = 1, 2 … 5) of conduction band C1(Γ6) to valence band V1(Γ1) was observed. Recombination from excitonic level of C1(Γ6) band to V2 and V3 bands (maxima nB = 1–2.1751 eV and nB = 2–2.2222 eV) and to V4 and V5 bands (maxima nC = 1 – 2.311 eV and nC = 2–2.350 eV) was observed. Luminescence maxima nD = 1 (2.399 eV) and nD = 2 (2.434 eV) attributed to transitions between C1 – V6, V7 bands and E3 maximum caused by recombination C2 – V1 were found out. A model of energy bands responsible for observed transitions was suggested. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Springer Nature Switzerland | en_US |
| dc.rights | Attribution-NonCommercial-NoDerivs 3.0 United States | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/us/ | * |
| dc.subject | gallium selenide | en_US |
| dc.subject | excitonic states | en_US |
| dc.subject | band structures | en_US |
| dc.subject | photoluminescence | en_US |
| dc.subject | wavelength modulation reflection spectra | en_US |
| dc.title | Ground and Excited States of Excitons in GaSe Single Crystals | en_US |
| dc.type | Article | en_US |
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2023
6th International Conference on Nanotechnologies and Biomedical Engineering, September 20–23, 2023, Chisinau, Moldova
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