High near-infrared emission intensity of Er³⁺-doped zirconium oxide films on a Si(100) substrate

Abstract

High crystalline quality erbium-doped zirconium oxide films were deposited on Si(100) by electron beam evaporation in high vacuum. Characteristics of light emission in the telecommunication window from erbium oxide crystal zirconium oxide films were investigated before and after furnace annealing in oxygen atmosphere. The luminescence intensity of the erbium-doped thin film after annealing at 900 °C was 18 times higher than those before thermal annealing. Also, it was observed a decrease in the intensity of luminescence and the 4 I 13/2 lifetime with the increase of the erbium concentration, which was analyzed via energy transfer -quenching. The structure environment of the erbium ion in the thin film before and after annealing has been studied by X-ray diffraction. The surface morphology of the films as a function of the annealing temperature and atmosphere showed a significant change.

High red emission intensity of Eu:Y2O3 films grown on Si(1 0 0)/Si(1 1 1) by electron beam evaporation

“…This fact suggests that the probability of the occupancy of Eu 3 þ at the C 2 sites increases upon thermal treatment in oxygen atmosphere, therefore favoring the formation of electric dipoles. In this manner, we confirmed that the electric dipole transitions are hypersensitive to the ligand environment, as already indicated in the literature [18][19][20][21][22][23][24][25][26][27][28][29][30].…”

“…The increase in emission intensity ( Fig. 3) with increasing film thickness arises due to the increasing volume available for photon-solid interactions [25]. This improvement in the emission intensity increased further following the thermal treatment because the vacancies in the films were filled with oxygen ions [25][26][27].…”

Recent advances in lanthanide spectroscopy in Brazil

“…Other investigations involving thin films, MOFs and coordination polymers have been reported in the literature [18,63,73,78,88,94,133,141,169,178,182,185,201,.…”