Locations of the energy levels of lanthanide ions in Gd2O3 single crystals

Locations of the energy levels of lanthanide ions in Gd2O3 single crystals Full article

Journal

Optical Materials
ISSN: 1873-1252 , E-ISSN: 0925-3467

Output data

Year: 2023, Volume: 143, Article number : 114265, Pages count : 8 DOI: 10.1016/j.optmat.2023.114265

Authors

Pustovarov V.A. ¹ , Ogorodnikov I.N. ¹ , Nikolaev R.E. ² , Tarasenko M.S. ² , Tavrunov D.A. ¹ , Trifonov V.A. ² , Naumov N.G. ²

Affiliations

1	Ural Federal University, 19 Mira Str., Ekaterinburg, 620002, Russia
2	Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Science, 3 ac. Lavrentyev Ave., 630090, Novosibirsk, Russia

Funding (1)

Russian Science Foundation

22-43-02079

Large-sized, high optical quality Gd2O3 single crystals were grown from a solution at T = 1145 °C using Czochralski method. XRD analysis showed that the crystal structure is characterized by a single cubic (bixbyite) phase (c-phase). The absorption spectra and luminescence properties of Gd2O3 doped with Eu3+ and Tb3+ impurity ions were studied. The absorption spectrum of Gd2O3:Eu in the short wavelength region is mainly due to charge transfer transitions from O2− to Eu3+ (240–290 nm), which overlap with the Urbach tail of the host-absorption. Additionally, electronic transitions in Eu3+ (320–540 nm) and Gd3+ (245–315 nm) lanthanide ions contribute to the absorption spectrum. Intraconfigurational radiative f – f transitions in impurity ions are clearly observed upon both UV- and X-ray excitations. However, 6PJ → 8S7/2 radiative transitions in Gd3+ ions are completely unobservable. Based on the obtained spectroscopic data, the energy positions of the ground state of all di- and trivalent lanthanide ions, as well as the energies of intraconfigurational f – f and interconfigurational f – d electronic transitions in Gd2O3 crystals with a cubic structure, are calculated. The proposed electronic energy diagram is used to discuss efficient energy transfer between lanthanide ions.

Pustovarov V.A. , Ogorodnikov I.N. , Nikolaev R.E. , Tarasenko M.S. , Tavrunov D.A. , Trifonov V.A. , Naumov N.G.
Locations of the energy levels of lanthanide ions in Gd2O3 single crystals
Optical Materials. 2023. V.143. 114265 :1-8. DOI: 10.1016/j.optmat.2023.114265 WOS Scopus OpenAlex

Submitted:	Jun 19, 2023
Accepted:	Aug 15, 2023
Published print:	Aug 19, 2023
Published online:	Aug 19, 2023

Web of science:	WOS:001065014700001
Scopus:	2-s2.0-85168141166
OpenAlex:	W4386006391

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