Author, as appears in the article.: Mateos, X. ; Loiko, P. ; Vilejshikova, E. V. ; Serres, J. M.; Dunina, E. B. ; Kornienko, A. ; Yumashev, K. ; Aguiló, M. ; Díaz, F.

Department: Química Física i Inorgànica

URV's Author/s: MATEOS FERRÉ, XAVIER; Loiko, P. ; Vilejshikova, E. V. ; Serres, J. M.; Dunina, E. B. ; Kornienko, A. ; Yumashev, K. ; AGUILÓ DÍAZ, MAGDALENA; DÍAZ GONZÁLEZ, FRANCISCO MANUEL

Keywords: Double tungstates Europium absorption

Abstract: We report on a detailed spectroscopic study of Eu3+ ions in the monoclinic KYb(WO4)2 crystal. The polarized room and low-temperature absorption spectra are measured. The maximum ¿abs corresponding to the 7F1 ¿ 5D1 transition is 1.32×10-20 cm2 at 534.2 nm with a bandwidth of 0.7 nm (for E || Nm). The Stark sub-levels of the excited mulitplets are determined. A Judd-Ofelt analysis is applied to the Eu3+:KYb(WO4)2 crystal to determine the probability of spontaneous transitions, radiative lifetimes and luminescence branching ratios. Within the strong configuration interaction (SCI) approxi-mation, the intensity parameters are ¿2 = 4.757, ¿4 = 2.295, ¿6 = 1.644 [10-20 cm2] and ¿f = 50160 cm¿1. The radiative lifetime of the 5D0 state is 351 µs. The maximum stimulated-emission cross-section corresponding to the 7F1 ¿ 5D1 transition is 1.44×10-20 cm2 at 703.2 nm (for E || Nm). Under UV excita-tion, the Eu3+: KYb(WO4)2 crystal provides intense red photoluminescence with CIE coordinates, x = 0.675, y = 0.325.

Research group: Física i Cristal.lografia de Materials Física i Cristal·lografia de Nanomaterials

Thematic Areas: Química Química Chemistry

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 0022-2313

Author identifier: 0000-0003-1940-1990; ; ; ; ; ; ; 0000-0001-6130-9579; 0000-0003-4581-4967

Record's date: 2018-07-05

Last page: 225

Journal volume: 183

Papper version: info:eu-repo/semantics/submittedVersion

Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0022231316313291?via%3Dihub

Funding program: plan; RETOS; MAT2013-47395-C4-4-R plan; Retos; TEC2014-55948-R altres; Grupos consolidados; 2014SGR1358 altres; Icrea Academia; 2010ICREA-02 euratom; Marie Sk¿odowska-Curie ; 657630

Article's DOI: 10.1016/j.jlumin.2016.11.046

Entity: Universitat Rovira i Virgili

Journal publication year: 2017

First page: 217

Publication Type: Article Artículo Article