Analysis of Nanoporous Semiconductor Film Thickness Effect on Short Circuit Current Density of β-Carotene Dye based DSSC: Theoretical and Experimental Approach

Abstract

Dye-sensitized solar cells (DSSC) made of TiO 2 have received increasing attention since O’Regan and Gratzel published their work in Nature in 1991 [1]. Some studies have been conducted to determine the effect of the TiO 2 electrode thickness on the DSSC performance. Nevertheless, the effect of the electrode thickness on the J–V characteristics, especially the short circuit current density ( J sc ), has not been adequately addressed. Therefore, in this investigation, parametric analyses were conducted to study the DSSC electrode thickness effect on J sc . Diffusion model was used to derive the equation of nanoporous semiconductor film thickness ( d ) dependence on J sc . TiO 2 paste was prepared using same method as Ref. [2]. The cells I-V curve were characterized using a computerized digital multi-meter (Keithley 2400) with a variable load. The cells short circuit current ( J sc ) data gotten from the I-V characterization were plotted as the function of the thickness of TiO 2 films. The result of the data plot was then compared and fitted with the theoretical modelling result. It is apparent that the DSSC performance largely depends on the TiO2 film thickness. The results was also showed that the diffusion model provided good approximation to describe the dependence of J sc on the film thickness of DSSC. DOI: http://dx.doi.org/10.17977/um024v4i12019p001