Abstract
Polymer blends are potential candidates for solar-energy conversion, due to their flexibility, ease of processing, and low costs. We report herein 2.6 cm2 active area of flexible polymer solar cells based on blends of polymeric semiconductor [poly (2-methoxy-5-(3,7-dimethyloctyloxy)-(para-phenylene vinylene)] (MDMO-PPV) and the soluble fullerene C60 derivative [6,6 phenyl C61-butyric acid methyl este (PCBM). Devices were prepared by etching an electrode pattern of Indium Tin Oxide (ITO) covered on poly [ethylene terephthalat (PET) substrate. A layer of conducting poly (3,4-ethylenedioxythiophene):poly (styrene sulphonate) (PEDOT:PSS) were screen printed on top of the ITO. Followed by spin coated a polymer blends of MDMO-PPV/PCBM in chlorobenzene onto PEDOT:PSS layer. Finally, evaporation of a silver electrode and PET film lamination completed the devices. The typical overall power efficiency of the prototype devices in an active area of 2.6 cm2 was 0.004 % with open-circuit voltage of 1.473 Volt, short-circuit current of 5.84 x 10-06 Ampere, and maximum power of 2.12 x 10-06 Watt.
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