AVS 47th International Symposium
    Thin Films Thursday Sessions
       Session TF-ThA

Paper TF-ThA10
Properties of Sol-Gel Prepared (ZnO)@sub y@(CdO)@sub 1-y@ Thin Films, with Low Concentrations of Cd in Solution

Thursday, October 5, 2000, 5:00 pm, Room 203

Session: Transparent Optical Coatings
Presenter: G. Torres-Delgado, Unidad Querétaro, Mexico
Authors: C.I. Zúñiga-Romero, Unidad Querétaro, Mexico
G. Torres-Delgado, Unidad Querétaro, Mexico
L. Licea-Jiménez, Unidad Querétaro, Mexico
S. Jiménez-Sandoval, Unidad Querétaro, Mexico
O. Jiménez-Sandoval, Unidad Querétaro, Mexico
R. Castanedo-Pérez, Unidad Querétaro, Mexico
Correspondent: Click to Email
(ZnO)@sub y@(CdO)@sub 1-y@ thin films were prepared by the sol-gel method, with low atomic concentrations (x) of Cd in solution, i.e. 0@<=@x@<=@0.32, at @Delta@x = 0.04 intervals. The precursor solution was mainly based on zinc acetate dihydrate, cadmium acetate dihydrate, and ethylene glycol. The films were deposited on slide glass substrates, and annealed at 400°C, in open atmosphere for 60 min. The X-ray diffraction data show that the films are formed by a polycrystalline mixture of wurtzite-type ZnO and cubic-type CdO; the patterns, as well as electron dispersion spectroscopy (EDS) data, are indicative of a larger concentration (y) of CdO in the films, i.e. 0@<=@y@<=@0.7, with respect to that in solution. In support, the resistivity of the films decreases from @rho@=10@super 2@@ohm@cm for x = 0 (y = 0), to @rho@=5 x 10@super -2@@ohm@cm for x = 0.32 (y = 0.7). The UV-Vis spectra show that the films, throughout the composition range, display a high transmission, above 90%, at @lambda@@>=@600 nm.