The luminescence properties of Zn-rich zinc oxide thin film have been inves
tigated. The luminescence of ZnO:Zn is attributed to the band to band radia
tive transition and the recombinations at self-activated centers intrinsic
to ZnO. The UV and blue electroluminescence emission band centered around 4
80 nm and the broad ultraviolet photoluminescence spectra are observed. The
field-induced ionization of excited luminescent of ZnO:Zn thin film at hig
h electric field is discussed. (C) 2000 Elsevier Science B.V. All rights re
served.