الفهرس 
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Abstract
Solar cell is the most promising technology for the future of green energy production. To fully realize the potential use of photovoltaic technology, low manufacturing cost and high working photoconversion efficiency must be obtained. Light trapping by metal nanoparticles is an attractive strategy in bulk silicon solar cells aimed to confine light within the active layer to promote the absorption and therefore achieving higher efficiency. In this work, we studied the deposition of different size nanoparticles on bulk silicon solar cells by DROP in technique in order to enhance their photovoltaic conversion efficiencies due to Plasmonic Light Scattering phenomena by metal nanoparticles. The effect of Plasmonic Light Scattering on reflectance, I-V measurements and photosensitivity using lamp and laser radiations were studied by preparing three different sizes of silver nanoparticles (14, 25 and 35) nm. The sizes of prepared Ag NPs were determined experimentally by TEM and UV-Vis absorption spectroscopy techniques and we notice that there is an increase of the total output power of solar cell with increasing Ag NPs size. Mie theory was used to give characterization information about their optical properties, and confirm the size of Ag NPs theoretically. Before depositing nanoparticles the reflectance was approximately 70% but after depositing the nanoparticles it was reduced to 54, 48 and 37% depending on the NPs sizes which were 14, 25 and 35 nm respectively. On the other hand, we observed that the solar cell which was covered with AgNPs have anenhanced value of the short circuit current (Isc). where the short circuit current was increased to 23.9%, 30% and 41.6% relative to sizes 14, 25 and 35 nm respectively.