Szkła wykazujące emisję światła białego

Abstract

This doctoral dissertation presents systematic results from borate glasses to germanate glasses singly, doubly and triply doped with Dy³⁺ and Ln³⁺ (Ln = Ce, Pr, Tm, Tb, Eu, Sm) ions as potential candidates to generate white luminescence. All samples were synthesized using the traditional melt quenching-technique. To study the spectroscopic properties of these glass systems, the excitation and luminescence spectra were recorded. The energy transfer processes between of rare earth ions were also examined. Moreover, the influence of concentration of rare earth ions, oxide and fluoride modifiers and excitation wavelengths on spectroscopic properties of glasses was studied. In particular, the correlation between the glass host and the yellow-toblue luminescence intensity ratio Y/B were examined. Moreover, from the emission spectra the Commission Internationale de I’Eclairage (CIE) chromaticity coordinates (x, y) and the correlated color temperatures (CCT) were calculated in relation to the potential application of prepared glasses for white lighting. The obtained results indicate that these glasses can be used as potential white light emitters.