Energy transfer from Dy3+ to Tb3+ in lead borate glass.

Abstract: Luminescence properties of Dy3+–Tb3+ co-doped lead borate glasses were investigated. Luminescence spectra were registered under various excitation wavelengths. Characteristic luminescence bands corresponding to transitions of Dy3+ and Tb3+ ions were detected under excitation of trivalent dysprosium. The energy transfer from Dy3+ to Tb3+ ions in lead borate glass occurs through a nonradiative process with an efficiency up to 16%. The presence of energy transfer process was also confirmed by excitation spectra measurements. [Copyright &y& Elsevier]