Dependence of electrical and optical properties of sol-gel prepared undoped cadmium oxide thin films on annealing temperature

作者：Santos Cruz J; Torres Delgado G; Castanedo Perez R; Jimenez Sandoval S; Jimenez Sandoval O; Zuniga Romero CI; Marin JM; Zelaya Angel O^*

来源：Thin Solid Films, 2005, 493(1-2): 83-87.

DOI：10.1016/j.tsf.2005.07.237

• sol-gel
• optical coatings
• oxides
• surface morphology

The effect of the annealing temperature (T-a) on the optical, electrical and structural properties of the undoped cadmium oxide (CdO) thin films obtained by the sol-gel method, using a simple precursor solution, was studied. All the CdO films annealed in the range from 200 to 450 degrees C are polycrystalline with (111) preferential orientation and present high optical transmission > 85% for wavelengths above 500 rim. The resistivity decreases as T-a increases until it reaches a value of 6 x 10(-4) Omega cm for T-a = 350 degrees C. For higher temperatures the resistivity experiences a slight increase. Images obtained by atomic force microscopy show an evident incremental change of the aggregate size (clusters of grains) as T-a increases. The grain size also increases when T-a increases as observed in data calculated from X-ray measurements.

• 出版日期2005-12-22