Improvement of Performance of Conjugated Polymer Solar Cells Coated

Abstract

Polymer solar cells are one of the promising alternative energies which can be easily manufactured with low coast. In this work polymer cells with different thicknesses and three different type of organic dyes (Rhodamine 6G, Coumarin 500 and Dibenzocyanin 45) are fabricated. The effect of the concentration of different organic dye on various electrical and optical properties of the samples produced has been studied. It was found that when the conjugate polymer layer deposition on the slides at low speeds by spin coating technique (increasing the thickness of the conjugate polymer layer), results in higher efficiency of the cells. The use of the organic dye (DDTTCI) led to improved in efficiency and absorption coefficient of light in the samples. In addition, the optical absorption spectra were recorded for those samples with a UV-VIS spectrophotometer (model: UV mini-1240) within the wavelength range of 200–800 nm, at room temperature. The samples show variations in absorption coefficient which depending on the type of organic dye used as well as the concentration of conjugate polymer. The short-circuit current, open circuit voltage and the fill factor of each sample have been calculated. The efficiency was found in the range of 10.28-1.744% for designed samples