Estudio de las propiedades optoelectrónicas de sustratos polimericos con depósitos de CoOx-CuOx

Abstract

In this work, the influence of bimetallic copper oxide-cobalt particles on the physicochemical and optoelectronic properties of Polifuran films is analyzed for their application in the absorption of electromagnetic energy in photostimulated processes. The work deals with the study of bimetallic particles of CuxCoyOz in two varieties, one calcined at 480 ° C and the other without thermal treatment. The synthesis by plasma and the characterization of polyfurane films and polyfuran hybrid compounds with bimetallic CuxCoyOz particles are presented. The electrical properties are studied, especially the conductivity and the activation energy. The synthesis of PFu was performed by plasma polymerization of glow discharges; the thickness of the film is in the range of 10-90 μm. The bimetallic particles of copper-cobalt oxides (CuxCoyOz) were synthesized by chemical reduction with NaBH4, from there they were obtained to CuxCoyOznc which are uncalcined particles and to CuxCoyOzc * particles calcined at 480°C. The particles were obtained with a quasi-spherical profile with average size in the range of 40-100 nm and atomic ratio of Co/Cu=0.96 before calcining, after the heat treatment the ratio was Co/Cu=1.76. The formation of the polymer/ CuxCoyOz hybrid was performed by cryo incorporation using a cryogenic process, which consists of modifying the surface of the PFu film with liquid N2 for the formation of pores on the surface of the substrate, which will lodge the bimetallic particles. The mass ratio PFu/Particles of 10/1 was used. Two hybrid combinations were obtained: PFu/CuxCoyOznc and PFu/ CuxCoyOzc *. The individual materials and the combined ones were analyzed to know the chemical structure by infrared spectroscopy and X-Ray photoelectronics, the morphology by scanning electron microscopy, the crystal planes by X-ray diffraction, the absorption and reflection by optical microscopy. The electrical conductivity was calculated as a function of the temperature in the range of 25 to 100 ° C and the electromagnetic absorption was measured in the UV-Vis region, 200-850 nm.