Publication: Effect of surface roughness of TiO2 films on short-circuit current density of photoelectrochemical cell of ITO/TiO2/ PVC-LiClO4/graphite
Date
2005
Authors
Rahman M.Y.A.
Salleh M.M.
Talib I.A.
Yahaya M.
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Abstract
This paper reports the effect of surface topography of titanium dioxide films on short-circuit current density of photoelectrochemical solar cell of ITO/TiO2/PVC-LiCLO4/graphite. The films were deposited onto ITO-covered glass substrate by screen-printing technique. The films were tempered at 300�C, 350�C, 400�C, 450�C and 500�C for 30 min to burn out the organic parts and to achieve the films with porous structure. The surface roughness of the films were studied using scanning electron microscope (SEM). Current-voltage relationship of the devices were characterized in dark at room temperature and under illumination of 100 mW cm-2 light from tungsten halogen lamp at 50�C. The device utilising the TiO2 film annealed at 400�C produces the highest short-circuit current density and open-circuit voltage as it posses the smoothest surface topography with the electrolyte. The short-circuit current density and open-circuit voltage of the devices increase with the decreasing grain size of the TiO2 films. The short-circuit current density and open-circuit voltage are 0.6 ?A/cm2 and 109 mV respectively. � 2004 Elsevier B.V. All rights reserved.
Description
Keywords
Photoelectrochemical cell , Screen-printing technique , Surface topography , Titanium dioxide , Current density , Current voltage characteristics , Films , Photoelectrochemical cells , Porous materials , Scanning electron microscopy , Screen printing , Short circuit currents , Solar cells , Substrates , Surface roughness , Surface topography , Open circuit voltage , Short circuit current density , Titanium dioxide films , Titanium dioxide