The Photovoltaic Response in a Series of Conducting Polymer Thin Film Devices
Khaulah Sulaiman, and Bradley, D.D.C., (2004) The Photovoltaic Response in a Series of Conducting Polymer Thin Film Devices. Jurnal Fizik Malaysia, 25 (3 & 4). pp. 59-63. ISSN 0128-0333
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University of Malaya. Faculty of Science. Dept. of Physics.
University of Sheffield. Dept. of Physics.
The photovoltaic and photocurrents properties of the conjugated polymer photo diodes are reported. The photovoltaic devices were fabricated with a layer of poly(para-phenylene-co-2,5-dialkoxy phenylene-vinylene), (PPV-co-DAOPV) sandwiched between indium tin oxide (ITO) and aluminium electrodes. Under illumination, the devices exhibited large photo currents compared to the dark currents, showing a great potential application as a photodetector. The influence of alkoxy side chain length (methoxy to hexadecyloxy) of PPV-co-DAOPV on photovoltaic devices has been investigated. The quantum efficiency of the short-circuit photo current under 0.25 mW/cm² illumination at 2.48 eV drops by an order of magnitude from about 0.3% for the polymer with the shortest side chains to about 0.03% for the polymer with the longest side chains. We consider that this is primarily a reduction in the efficiency of the exciton dissociation.
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