Spectroscopic and photoluminescence characterization of Eu 3+-doped monoclinic KY(WO4)2 crystal
Bibliographic entry
Spectroscopic and photoluminescence characterization of Eu3þ-doped monoclinic KY(WO4)2 crystal / P. A. Loiko [et al.] // Journal of Luminescence. – 2014. – Vol. 153. – P. 221-226.
Abstract
Monoclinic 2 at% Eu-doped KY(WO4)2 is grown by top-seeded solution growth method. Polarizationresolved 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 x¼0.670, y¼0.329.