Tunable luminescence from Sm³⁺, Ce³⁺codoped Al₂O₃–La₂O₃–SiO₂glasses for white light emission

Sm³⁺, Ce³⁺codoped Al₂O₃–La₂O₃–SiO₂glasses 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 Ce³⁺and Sm³⁺has also been investigated from fluorescence decay curves and spectral properties.