IMPROVING THE PROCESS OF MANUFACTURING N719 DYE – SENSITIZED SOLAR CELLS FOR THEIR HIGH PERFORMANCE

Abstract

This paper studies the process of manufacturing a dye sensitized solar cell by silk – screen printing method. By this method, the FTO glass substrate is coated by TiO₂ and platinum to fabricate anode and cathode electrodes. In particular, the N719 dye used as a photo-sensitive material has absorption peak in the visible light region and the wavelength of about 488 nm that is determined by absorption spectroscopy. It presents the results of the study on optical properties via absorption spectroscopy, the surface morphology by SEM image analysis, structure through X-ray diffraction (XRD) and Raman spectroscopy. The highest efficiency obtained is 3.02% of the cells measured by 2400 Keiley devices under the luminous intensity of 100mW/cm². The characteristic parameters such as open circuit, short circuit and FF coefficients are quite high are 0.68 V, 7.38 mA and 0.59 respectively.