Spectroscopic and photoluminescence characterization of Eu3+-doped monoclinic KY(WO4)2 crystal

• Published in: Journal of luminescence Vol. 153; pp. 221 - 226
• Main Authors: Loiko, P.A., Dashkevich, V.I., Bagaev, S.N., Orlovich, V.A., Yasukevich, A.S., Yumashev, K.V., Kuleshov, N.V., Dunina, E.B., Kornienko, A.A., Vatnik, S.M., Pavlyuk, A.A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2014
• Subjects: Absorption; Double tungstates; Photoluminescence; Red emission; Trivalent europium; Red emission; Trivalent europium; Absorption; Double tungstates; Photoluminescence
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2014.03.037

Monoclinic 2at% Eu-doped KY(WO4)2 is grown by top-seeded solution growth method. Polarization-resolved absorption and stimulated-emission cross-section spectra are determined for this crystal. Spectroscopic properties of Eu:KY(WO4)2 are modeled within conventional Judd–Ofelt theory, as well as theory of f–f transition intensities for systems with anomalously strong configuration interaction, yielding absorption oscillator strengths, luminescence branching ratios and radiative lifetime of 5D0 state. The impact of excited-state absorption from this state on possibility of laser operation is discussed. Photoluminescent properties of Eu:KY(WO4)2 are determined. This crystal provides intense red emission with CIE coordinates x=0.670, y=0.329. •Top-seeded solution growth of 2at% Eu3+:KY(WO4)2 monoclinic crystals.•Polarization-resolved absorption and stimulated-emission cross-section spectra.•Modeling of spectroscopic parameters with modified Judd–Ofelt theory.•Inversion parameter for Eu3+ emission in KY(WO4)2, R=12.•Photoluminescence: the crystal provides intense red emission (x=0.670, y=0.329).