%0 Journal Article %A Díaz-Guerra Viejo, Carlos %A Remon, A. %A García, J. A. %A Piqueras de Noriega, Javier %T Cathodoluminescence and photoluminescence spectroscopy of NiO %D 1997 %@ 1862-6300 %U https://hdl.handle.net/20.500.14352/59153 %X Cathodoluminescence (CL) and photoluminescence (PL) of nickel oxide (NiO) have been investigated. The observed emission bands in the visible and near infrared spectral ranges are attributed to Ni^(2+) intraionic transitions. Some of the features observed in the CL spectra recorded from vacuum annealed samples are tentatively attributed to electronic transitions involving defect-induced states located inside the charge-transfer gap of this transition metal oxide. %~