Fabrication of titanium dioxide thin film prepared by spray pyrolysis deposition method for dye-sensitized solar cell

Mohamad Fazli, Fatin Izyani (2017) Fabrication of titanium dioxide thin film prepared by spray pyrolysis deposition method for dye-sensitized solar cell. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Nanostructured Titanium dioxide (TiO2) thin films with the area of 0.25cm2 were successfully fabricated on Fluorine-doped tin oxide (FTO) substrate on glass for dye sensitized solar cell (DSSC) application using spray pyrolysis deposition (SPD) method. The performance of each sample depend on the surface morphology, structure and thickness of the samples. The TiO2 thin film was fabricated using P25 TiO2 nanopowder which is a combination of anatase and rutile structure, to have different thickness ranging from 5 μm to 20 μm by varying the TiO2 colloidal solution of 5 ml, 10 ml, 15 ml and 20 ml to find the optimum thickness for DSSC application. Field Emission Scanning Electron Microscopy (FESEM) analysis on the samples showed that the 5 ml sample with thickness of 2.379 μm is too thin that the FTO structure underneath is visible. The sample with the highest efficiency of 1.677 % and 2.633 mA/cm2 Jsc is yielded by 10 ml sample. Further optimization for the annealing temperature is done by varying the annealing temperature from 300 ºC to 500 ºC at fixed annealing time of 3 hours. Optimized annealing temperature is 500 ºC with 3.42 % efficiency and 5.359 mA/cm2 Jsc. The annealing time was also varied to from 1 hour to 24 hours. The structural analysis of the samples showed that the rutile structure increased as the annealing time increased. The optimum annealing time is proven to be 3 hours with 4.034 % efficiency and 5.937 mA/cm2 Jsc. TiO2 samples fabricated by using pure anatase structure were also analyzed and compared to the samples fabricated using P25. The annealing temperature for the pure anatase samples was varied from 300 ºC to 500 ºC. The efficiency of the P25 is slightly higher than pure anatase TiO2 which has the highest efficiency of 3.249 % annealed at 500 ºC. The optimum TiO2 is the one fabricated with the P25 TiO2 powder annealed at 500 ºC for 3 hours with the ruthenium based N719 dye as sensitizers.

Item Type:Thesis (Masters)
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
ID Code:9900
Deposited By:Mr. Mohammad Shaifulrip Ithnin
Deposited On:27 Mar 2018 11:55
Last Modified:27 Mar 2018 11:55

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