Photosensitizing Effect of Porphyrin Films as Organic Photodetector

Supriyanto, Agus and Kusminarto, Kus and Triyana, Kuwat and Roto, Roto and Salleh, Muhamad Mat and Umar, Akrajas Ali (2010) Photosensitizing Effect of Porphyrin Films as Organic Photodetector. Journal of Materials Science and Engineering,, 4 (8). ISSN 1934-8959

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    Abstract

    Key words: Organic photosensitizer, natural porphyrin, titanium dioxide anatase, phorocurrent Abstract: A set of organic photodetector devices arranged as indium doped tin oxide (TTO)/porphyrin/TiOialuminum has been fabricated and its performance has been tested in dark and under various illumination of visible light intensity from 20-100 mW/cm2. Four devices were prepared using natural porphyrin by I, 3, 5 and 7 times of spin coating. First, porphyrin film was deposited onto indium doped tin oxide (!TO)-covered glass substrate by spin coating technique. Second, titanium dioxide (Ti02) film was deposited on top of the porphyrin film using similar technique. Porphyrin was isolated from spirulina microalgae and Ti02 nanoparticle was prepared by controlled hydrolysis technique using titanium(IV) etoxide, Ti(OC2Hj)4, and potassium chloride. The films were characterized by UV-vis spectrophotometer to investigate their absorption spectra. The porphyrin film has maximum absorbance at 660 nm, which is in the red region. Then, an aluminum electrode was prepared on top of TjO, film by electron beam evaporation technique. The resulting device shows rectification property in dark and shows photosensitizing effect under illumination. The device prepared by 3 times of spin coating of porphyrin films shows the highest current density, J,c, of 5. 76 rlA/clll2 and open circuit potential, V"c, of 648 mV, respectively.

    Item Type: Article
    Subjects: Q Science > Q Science (General)
    Q Science > QC Physics
    Divisions: Lembaga Penelitian dan Pengabdian Kepada Masyarakat - LPPM
    Depositing User: Anis Fagustina
    Date Deposited: 18 Apr 2014 04:34
    Last Modified: 18 Apr 2014 04:34
    URI: https://eprints.uns.ac.id/id/eprint/11894

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