The photocell is one of alternative technologies. There are so manyresearches in this field such a blending of some materials. Because of high mobility of the charge carriers and high absorptioncoefficient in visible part of the spectrum, PPV can be applied to molecular opto-electronic devices, such a photocell [I]. ThePPV molecule absorbs an incident photon on specific wavelength. The wavelength is about 540 nanometer or green color oflight. Goossens, et.al. have developed a modification ofTiO2 nanoparticles and PPV polymers, giving some advanta~:es forphotocell application. In the photocell, PPV as p-type is combined with n-type to form a pin junction. The photoinducedelectron transfer of semiconducting polymers (as p-type) and TiO2 (as n-type) in a blend reveals photoelectric response.Optimizing of the results such a increasing of the interfacial area of the different materials is a necessity. The conta<:t areabetween the TiO2 particles and PPV chains in a dispersion system of the blend is better than between the TiO, flat and PPVflat. The experimental finds some optimum conditions, namely the percolation threshold of PPV concentration on 4 mg permlof chloroform solvent with 1/300 Hz for the dropping frequency, and 50 units for the deposition flow rate ofTiO, particles.The experimental results were controlled by measuring I-V Curve and SEM observation. -Key Ivords : Photocell, semiconducting polymers, nanoparticles, photoelectric, interfacial area, percolation threshold. Mochamad Chalidl and Barbara van der Zanden2 I Departement of Metallurgy and Materials Engineering, Faculty of Engineering -VI Kampus Barn VI, Depok 164242Departement ofChernical Engineering Faculty of Applied Sciences TV-Delft, The Netherlands
