Cathodoluminescent characteristics of undoped and fluor doped ZnO thin films prepared by spray pyrolysis
A. Bougrine1, M. Addou1*, A. El Hichou2, A. Kachouane1, J. Ebothé2, M. Lamrani1, L. Dghoughi1
1Université Ibn Tofail, Lab. d' optoélectronique et de physico-chimie des matériaux,
Faculté des Sciences, B. P. 133, Kénitra, Maroc
2Université de Reims, UFR Sciences, UTAP-LMET, UPRES EA 2061, 21 rue Clément Ader, 51685 Reims cedex 2, France
* Corresponding author. E-mail :firstname.lastname@example.org
Received : 07 May 2002; revised version accepted : 13 May 2003
Cathodoluminescence films of F-doped and undoped zinc oxide prepared by spray pyrolysis technique have been studied. The cathodoluminescence for F-doped zinc oxide is formed by broad three peaks at 382, 454 and at 672 nm at room temperature. Undoped films present the well-know blue green emission characteristic of ZnO. All deposited films are polycrystalline and have a hexagonal crystalline structure. The cathodoluminescence excitation spectra indicate that the luminescence intensity increase with increasing the voltage excitation and F-doped ZnO films have a good luminescence intensity. The optical absorption edge is independent of doping.
Keywords : Cathodoluminescence; Room temperature; ZnO; F-doped ZnO.