PHOTOELECTROCHEMICAL (PEC) CELLS BASED ON NEBULISED SPRAY PYROLYSED Bi2S3 THIN FILMS

摘要

Bi2S3 thin films are deposited on microscope glass slides and fluorine doped tin oxide (FTO) coated glass substrates by nebulised spray pyrolysis technique. The films are deposited at optimised deposition conditions. The films are characterized by X-ray diffraction and UV-Vis-NIR spectrophotometry and Atomic force microscopy. The photoelectrochemical properties of the films is analysed by capacitance-voltage measurements. Bi2S3 thin films coated on FTO coated glass substrates are used as photoanodes in a conventional two electrode electrochemical cell containing polysulphide electrolyte. The performance of the Bi2S3 photoanodes are analysed under different intensities of illumination. Cell parameters such as open circuit voltage, short circuit current,efficiency, fill factor, junction ideality factor are calculated. The efficiency of the PEC cell based on Bi2S3 photoelectrodes is 0.009% under an illumination intensity of 60mW/cm2.