Enhancement in power conversion efficiency of silicon solar cells with cobalt doped ZnO nanoparticle thin film layers

摘要: Abstract In this study, we report results on coating silicon solar cells with undoped and cobalt-doped zinc oxide (5%, 10%, 15%, 20%) nanoparticles ranging in diameter from 46 nm to 87 nm, synthesized by a simple low-temperature precipitation method. The morphology structure of have been characterized transmission electron microscopy X-ray diffraction spectroscopy. average size was found increases the increase cobalt concentration. Doped thin films were deposited spin technique cells. Optical properties layer investigated. We estimated film stress adding layers that is lowest for 139 nm layer. Bandgap an nanoparticle thickness. Photoluminescence spectra show blue shift near band edge emission peak Current-Voltage measurement confirms there enhancement power conversion efficiency as thickness varied 58 nm 139 nm. general, shows increasing trend up coated doped nanoparticles. addition, external quantum optimal nanostructured enhance photovoltaic cell experimentally determined be