Abstract
The efficiency of thin-film solar cells can be increased considerably by coupling the solar cells with plasmonic nanoparticles. However, while the benefits of utilizing plasmonic nanoparticles has formerly been recognized, the physical properties of the nanoparticles at which the conversion efficiency is optimized have not yet been completely studied. Among the possible properties, this study investigates meticulously the effects of plasmonic nanoparticle shapes and size on the improvement of the energy conversion efficiency of CIGS solar cells. Two different shapes including spheres and cylinders were analyzed in this study. It was revealed that the cylindrical Ag nanoparticles with a diameter of 50 nm and a height of 125 nm placed in an array with period of 215 nm exhibited the most substantial enhancement in the optical absorption and electrical current generation. The achievements in this article have been attained through optical and electrical analysis as well as the near-field imaging studies.
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