Fabrication of organic solar cells based on a blend of donor-acceptor molecules by inkjet printing technique

Organic solar cells become an interesting research due to their potential for low-cost and flexible power devices. Inkjet printing technique is a promising deposition method to fabricate low-cost and flexible organic solar cells. This paper reports the fabrication of organic solar cells using inkjet printing technique. A blend of electron acceptor and electron donor molecules made of -Phenyl C₆₁ -butyric Acid 3-ethylthiophene ester and Poly (3-octylthiophene-2, 5-diyl) were printed on an ITO coated glass substrate. Aluminum thin film was used as top electrode. I-V curves of the devices were measured in the dark and under illumination of light. It was found that the device showed rectifier property in the dark and able to generated electrical current under light. Further work to improve the performance of the device is discussed in terms of difference parameters such as number of layers and annealed temperatures.