| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1495981 | Optical Materials | 2011 | 6 Pages |
We study lutetium hafnate, Lu4Hf3O12, prepared by acetate and citrate combustion in the form of nanometric powders. Optical properties including X-ray excited luminescence, steady-state and time resolved photoluminescence as well as thermally stimulated luminescence are investigated for undoped as well as Eu3+ and Tb3+ doped samples. We identify recombination centers in the host matrix and we tentatively associate the principal emission with a radiative transition of the F+ center. We also demonstrate that athermal tunneling of charge carriers between traps and recombination centers is the predominant mechanism of delayed radiative recombination following irradiation by ionizing radiation.
► Lutetium hafnates nanophosphors prepared by acetate and citrate combustion. ► Principal emission in the host matrix associated with the emission of the F+ center. ► Emission of the rare-earth doped material dominated by the emission of rare-earth dopants. ► Delayed radiative recombination dominated by athermal tunneling of holes.
