Tio2 Film Analysis

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Xu et. al have synthesized the TiO2 film by mixing of TiO2 nanoparticles were in ethanol with different amounts of Triton-X100 and acetylacetone. The amounts of ethanol were 20, 40, and 60mL respectively. The amounts of acetylacetone were 0.4, 0.6, and 0.8mL. The sputtered Pt counter electrodes were pressed tightly on the prepared photoelectrodes. Solvent, dispersant, and surfactant play different roles in forming porous films of DSSCs when they are added into the paste. DSSC with the photoelectrode made from 2.5g of TiO2 nanoparticle powder dissolved in 20mL of ethanol containing 0.8mL of acetylacetone and 0.6mL of Triton-X100 shows a large increase in Jsc and a improvement in Voc. At the optimized point, photoelectric conversion efficiency…show more content…
The transmittance of ZnO passivating layers(ZNP) strongly depend on RF-gun power. Compared with the DSSC prepared without a passivating layer, the DSSC with ZNP layers demonstrated a high fill factor and high conversion efficiency. The DSSC with the ZNP layer, deposited under the 1:1 argon-oxide ratio, showed a high photocurrent density and a high fill factor (10.74 mA/cm2,72%). The DSSC fabricated onto the FTO electrode with the ZNP layer showed the highest conversion efficiency of 5.22% at an Ar: O2 ratio of 1:1, due to the prevention of the electron transfer to the electrolyte. Additional Ar: O2 ratios (1:0, 2:1, 1:2, 0:1) resulted in a decrease in efficiency and photocurrent density. Additionally, 80 W was the ideal RF-power. The improved conversion efficiency might be associated with improved surface roughness…show more content…
In XRD, it is observed that amorphous nature of dye films increases with fluence and hence aggregates of dye molecules spread homogeneously on the substrate after irradiation .The absorption spectroscopy and photoconductivity results show maximum absorption and minimum photoresistivity at lowest fluence [97]. The properties of the dye films such as increase in amorphous nature, increase in absorption peak area and marginal increase in photoconductivity are favorable for DSSC

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