Facile Microwave Approach for Synthesis of Copper-Indium Sulfide Nanoparticles and Study of Their Behavior in Solar Cell

CuInS2 (CIS) nanoparticles (nps) were synthesized via a microwave approach by adding eight sulfur sources with a new copper precursor, [bis(acetylacetonato)copper(II)]; [Cu(acac)(2)]. The products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet-visible and photoluminescence spectroscopy. Band gap of as-synthesized nps was 2.1 eV that showed about 0.55 eV blue shift in comparison to its bulk type. As observed in other semiconductor systems, the optical absorption blue shift is associated with quantum confinement effects. Thin film of CIS was prepared by doctor's blade technique and solar cell made from indium transparent oxide/CIS/CdS/Pt layers. I-V characterization was investigated for this cell and fill factor, open-circuit voltage ( (oc)) and short-circuit current ( (sc)) were achieved.