Tunable luminescence from Sm~(3+), Ce~(3+) codoped Al_2O3-La_2O_3-SiO_2 glasses for white light emission

摘要

Sm~(3+), Ce~(3+) codoped Al_2O3-La_2O3-SiO2 glasses were prepared and their luminescence properties were characterized. Blue-cyan to orange-red tunable luminescence was observed from these glasses with different excitation wavelengths ranging from 385 to 410 nm. White light emission with internal luminescence efficiency 42% has been observed using commercially available purple light-emitting-diode excitation. The energy transfer between Ce~(3+) and Snr(3+) has also been investigated from fluorescence decay curves and spectral properties.