Terbium-doped heavy metal glasses for green luminescence

Compositional-dependent heavy metal lead borate glasses doped with Tb3+ ions were investigated. Green luminescence related to main 5D4→7F5 (543 nm) transition was registered under excitation of 5D3 state of Tb3+ ions. Based on excitation and luminescence measurements, several spectroscopic parameters for Tb3+ ions were examined as a function of heavy metal PbO content. Luminescence decay analysis indicated that the 5D4 luminescence lifetime of Tb3+ reduced from 2.83 to 1.42 ms, when PbO:B2O3 ratio was changed from 1:1 to 4:1.