UV- Vis- NIR and luminescent characterization of PZCdO:Tm laser oxide glasses

摘要

(l)uminescent oxide glasses with composition 50P(2)O(5)-30ZnO-20CdO (PZCdO pure) and 50P(2)O(5)-30ZnO-2OCdO-30000 ppm Tm2O3 (PZCdO:Tm) were synthesized by using melt-quenching technique. The optical energy gap and Urbach energy of these glasses were calculated by using UV-Vis-NIR spectroscopy. Judd-Ofelt parameters Omega(2), Omega(4) and Omega(6), branching ratio, B-R, and radiative lifetimes, tau(R), of Tm3+ ions doped PZCdO glasses were estimated. The spectroscopic results showed that the present glasses has the effective emission cross section bandwidth (Delta lambda(eff) = 90 nm) and high stimulated emission cross-section (sigma(em) = 1.5 x 10(-21) cm(2)). The blue up conversion emissions sharp band at 458 nm corresponding to transition D-1(2) -> F-3(6) and weak emission band in NIR region assigned to (1)G(4) -> H-3(4) for the glasses PZCdO:Tm with UV-excited at 354 nm region were obtained. From result we can suggest that the present glasses can be used for blue light emitting diodes BLED chip. (C) 2017 Elsevier B.V. All rights reserved.