Effect of Spin-Coating Cycle on the Properties of TiO2 Thin Film and Performance of DSSC

Abstract

TiO 2 thin films based dye-sensitized solar cell (DSSC) were prepared by sol-gel spin-coating method. The number of spin-coating was varied, 1,2,3,5 and 7 times to get various thicknesses of TiO 2 thin film on the ITO substrate. The phase structure of anatase exists in all samples at the diffraction angle of 25.36 o corresponding with the crystal plane (101). From FESEM observation, the morphological shape of all samples is agglomerate nanoparticle. The sample with higher number of spin coating has pores with its size becomes bigger at the highest spin coating number. The thickness of TiO 2 film increases with the increase of spin coating number. The absorption window increases with the spin coating number. The DSSC with 7 times spin coating number demonstrates the best power conversion efficiency (η) which is 0.70% due to the broadest absorption window and lowest R b and R ct .

Controller of fluorine­doped tin oxide thin films deposition via cycles and annealing temperatures by spin coating techniques

“…Based on Fig. 2, b-d, with the increase in the number of cycles to 4, 5 and 6, the grain size is getting bigger, this is consistent with the research conducted by SN Sadikin who said that samples with a higher number of spin coatings cause the grain size to be larger at the highest spin layer and the layer thickness will also increase with the increase in the number of cycles [26]. The research result shows that the number of cycles has a significant effect on the increase in the grain size of the FTO thin film.…”

Effect of Concentration Variation on Optical and Structural Properties of TiO2 Thin Films

“…TiO2 as N-type semiconducting material has wide band gap with indirect energy band gap of 3.2 eV (anatase) and 3.02 eV (rutile) [6]. Several methods employed in preparation of TiO2 films include electron-beam evaporation [7,8], sputtering [9], sol-gel and dip coating, chemical vapour deposition [10] and spin-coating process [11][12][13]. Among the methods used, spin-coating offers advantages of low temperature processing, low cost, ease of coating large area and suitable for porous film preparation.…”

TiO2 treatment using ultrasonication for bubble cavitation generation and efficiency assessment of a dye-sensitized solar cell

“…The methods of preparing TiO 2 into a photoanode are spin coating [18] , dip coating [19] , screen printing [20] , and doctor blade method [20] , among others. Spin coating can smoothly control the voids and thickness of the photoelectrode, but the paste may aggregate at the edges due to a centrifugal force [21] .…”