Luminescence of ZrO2 Nanocrystals
The luminescence of nanocrystalline tetragonal and cubic ZrO2 has been investigated. The tetragonal undoped ZrO2 revealed two luminescence bands, at ~2.0 eV and 2.7 eV , but only one band at ~2.7 eV was observed from cubic ZrO2. This luminescence was shown to be intrinsic. The regular zirconium-oxygen complex excited state is suggested as being responsible for intrinsic luminescence.
Radu Robert Piticescu, Witold Lojkowski and John R. Blizzard
D. Millers et al., "Luminescence of ZrO2 Nanocrystals", Solid State Phenomena, Vol. 106, pp. 103-108, 2005