Effect of Na and Ti-doping on photovoltaic properties of CuInS₂ solar cells
by Duy-Cuong Nguyen; Toshihiro Ryo; Laurent Lombez; Seigo Ito
International Journal of Nanotechnology (IJNT), Vol. 10, No. 3/4, 2013

Abstract: CuInS₂ (CIS) films were deposited on In₂S₃/TiO₂/FTO/glass under air by spray pyrolysis, resulting in superstrate-structured solar cells. We found a significant difference of images between scanning electron microscope and optical microscope, which suggests crystallisation of spray-pyrolysis CIS particles in In₂S₃ layer. The In₂S₃ covering layer was confirmed by Auger Electron spectroscopy. Titanium-doping in In₂S₃ improved fill factor of CIS cells, however, the conversion efficiency was not changed. The best cells were achieved at 4% sodium doping using 350°C hot-plate and their cell parameters are open-circuit voltage = 0.551 V, photocurrent density = 11.65 mA/cm², fill factor = 0.45, and a conversion efficiency = 2.88%.

Online publication date: Fri, 05-Apr-2013

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