Emission Properties of RE3+ (RE = Eu, Tb): CdO-Li2O-B2O3-TeO2 Glasses

Abstract

Eu3+ or Tb3+ ions doped Cadmium lithium boro tellurite (CLiBT) glasses with different compositions were prepared by melt quenching method. The non-crystalline nature of the glasses has been verified by the XRD measurements. The photoluminescent properties were characterized with excitation and emission spectra. The emission spectra of Eu3+: CLiBT glasses measured with λexci = 392 nm (7F0→5L6) have shown five emission transitions at 578 nm, 592 nm, 612 nm, 652 nm, 701 nm and are assigned to the transitions 5D0→7F0,7F1,7F2,7F3 &7F4 respectively. Among these, the transition at 612 nm (5D0→7F2) has shown a bright red emission. In the case of Tb3+:CLiBT glasses upon excitation with 376 nm (7F6 → 5G6), the emission transitions have been observed at 436 nm, 456 nm, 450 nm, 467 nm, 488 nm, 508 nm, 542 nm, 583 nm, 612 nm, 653 nm and are assigned to the transitions 5D3→7F4,7F3,7F3 & 5D4→7F6,7F6, 7F5,7F4,7F3 &7F2 respectively. Among these, the transition at 542 nm (5D4→7F5) has shown a bright green emission. In this work, we have reported the emission properties of Eu3+ and Tb3+: CLiBT glasses to explore them as novel display materials.