Luminescence et interaction phonon—électron dans le luminophore MgS:Bi3+. I. Expérience générale

Emission and excitation spectra of MgS:Bi3+ phosphors are measured at 300, 80, and 6 K. Two emission bands 3T1u, 3A1u → 1A1g and three excitation bands A, B, C peculiar to Tl+‐type ions are observed. Furthermore, the D′ excitation bands corresponding to charge transfer transitions are also observed. The phonon structure on the emission and excitation bands for MgS:Bi3+ phosphors is compared with that for CaO:Bi3+ and CaS:Bi3+ phosphors. The values of the energy parameters of Bi3+ center are determined from the position of the three excitation bands.