Electronic structure and luminescence properties of Ca2Ge7O16:Dy3+

I.I. Leonidov; A.V. Ishchenko; E.I. Konstantinova; V.P. Petrov; V.A. Chernyshev; A.E. Nikiforov

doi:10.1051/epjconf/201713203027

All issues

Volume 132 (2017)

EPJ Web Conf., 132 (2017) 03027

Abstract

Open Access

Issue		EPJ Web Conf. Volume 132, 2017 XXV-th Congress on Spectroscopy


Article Number		03027
Number of page(s)		2
Section		Poster talks
DOI		https://doi.org/10.1051/epjconf/201713203027
Published online		13 December 2016

EPJ Web of Conferences 132, 03027 (2017)
https://doi.org/10.1051/epjconf/201713203027

Electronic structure and luminescence properties of Ca₂Ge₇O₁₆:Dy³⁺

I.I. Leonidov¹^,2^*, A.V. Ishchenko², E.I. Konstantinova¹, V.P. Petrov², V.A. Chernyshev² and A.E. Nikiforov²

¹ Institute of Solid State Chemistry UB RAS, 620990 Ekaterinburg Russia
² Ural Federal University, 620002 Ekaterinburg Russia

^* Corresponding author: ivanleonidov@ihim.uran.ru

Published online: 13 December 2016

Abstract

The present report represents an overview of the results of a combined experimental-computational study of electronic structure, thermoluminescence (TL) and afterglow properties of Ca₂Ge₇O₁₆:Dy³⁺ synthesized for the first time. Afterglow curves of Ca₂Ge₇O₁₆:Dy³⁺ at 575 nm showing persistent luminescence have been described in Becquerel law. The TL measurements reveal at least one TL band at 326 K and two luminescence bands at 475 and 535 nm. Persistent luminescence in Ca₂Ge₇O₁₆:Dy³⁺ originates from relatively shallow charge traps with high probability of charge carriers recapture. The model of energy processes, configurations of traps and luminescence centers has been proposed with the aid of ab initio calculations performed using the LCAO approximation and several hybrid functionals.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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