Vol. 40, Issue 2, pp. 367-374 (2010)

Abstract

Oxychloroborate glasses containing Dy³⁺ ions in the B₂O₃–PbCl₂–PbO–Al₂O₃–WO₃ system were studied using X-ray diffraction, Raman, FT-IR, absorption, excitation and luminescence spectroscopy. The results concerning glass preparation, short-range order structure and optical properties are reported. X-ray diffraction analysis evidently indicates that the fully amorphous system was prepared. Coexistence of trigonal BO₃ and tetrahedral BO₄ units was evidenced by Raman and FT-IR spectroscopy. The electronic states belonging to the 4f⁹ configuration of trivalent Dy³⁺ were determined from the absorption and excitation spectra. The luminescence bands at 480, 573 and 662 nm were registered in oxychloride glasses, which correspond to transitions originating from the ⁴F_9/2 state to the ⁶H_J/2 (J = 11, 13, 15) states of Dy³⁺.