Abstract
A nano-particle solution processing route to the cost effective and easy fabrication of Copper Indium diSelenide (CIS) layers is presented in this study via the Electrospray Deposition of six different inks containing CIS nano-particle colloid solutions. Six different inks have been developed after synthesizing the CIS nanoparticles via solvo-thermal process. The inks differ from each other based on solvents and particle concentrations. Molybdenum coated glass was used as a substrate to deposit ~1 µm thick CIS layers. These deposited layers were then characterized according to their deposition parameters, surface morphology, structural analysis, transmittance behavior and electrical properties. Highly uniform chalcopyrite films were obtained with good purity and more than 90% absorbance characteristics with an average sheet resistivity of ~50 Ω.cm thereby confirming the applicability of the films to be utilized in the ultimate manufacture of solar cells.
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