Munji, M. K.Gitonga, R.G.2014-10-212014-10-2120141st Young Scientists' MSSEESA Conference on Materials Science and Solar.' Cell Technologyhttp://ir-library.ku.ac.ke/handle/123456789/11500This research will involve characterization of Sn.Se.: S1102-Co P-N as a solar cell material. SnSe is Ci p- type semiconductor with a direct band gap and high absorption in the visible region spectrum Cobalt doped rin oxide is not only a direct band gap semiconductor but also has a wide band gap and high transmittance Solar cells making use either of the two materials have been fabricated and have achieved good efficiencies. A solar cell using the two materials for a P-N junction is yet to be fabricated In this.research Co-doped Sn02 and SnSe thin films will be deposited on glass substrates using spray pyrolysis technique. The precursor solution will be prepared by dissolving 0.025 M of stannic chloride (SnCl2.5H2O) and different amounts of cobalt nitrate 6-hydrate (Co (NO;)2:6H20) and 1 - 1 dimethyl selenourea (IC3H8N2Se. Different thin films such as Sn02: CO-SIl02: SnSe and Co-SnO]: Snse \will be prepared Optical properties of thin films will be characterized i.e. absorbance spectra, transmittance and reflectance with UV-VIS-NIR spectrophotometer and the band gap of the films will be analysed by use 01scout software. Electrical characterization especially sheet resistivity wiII be measured using the Four point probe method. Thin films with optimum properties will be used at fabricated a P-N junction through double deposition. I-V characteristics of the junction will be done using. Keithley 2400 source meter and a computet. Fill factor (FF), open circuit voltage (Voc), and efficiency of tile junction wil] be obtainedenArticle