Author(s)

Tsuyoshi Hamatani, Yasuhiro Shirahata, Yuya Ohishi, Misaki Fukaya, Takeo Oku^*

Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan.

Arsenic (As) and chlorine (Cl) were co-doped to CH₃NH₃PbI₃ perovskite solar cells, and the photovoltaic properties were investigated. AsI₃ and NH₄Cl were added to perovskite precursor solution, which were deposited on mesoporous TiO₂ by a spin-coating combining an air flow method. Current density-voltage characteristics and incident photon-to-current conversion efficiencies were improved by the co-doping of As and Cl to the perovskite phase, which also indicated an energy gap of 1.57 eV. X-ray diffraction showed suppression of PbI₂ formation by the AsI₃ addition. The structure analysis by scanning electron microscopy indicated formation of a homogeneous microstructure by adding AsI₃ with NH₄Cl, which would result in the improvement of the photovoltaic properties.

Perovskite, Arsenic, Solar Cell, NH4Cl, Chlorine

Hamatani, T. , Shirahata, Y. , Ohishi, Y. , Fukaya, M. and Oku, T. (2017) Arsenic and Chlorine Co-Doping to CH₃NH₃PbI₃ Perovskite Solar Cells. Advances in Materials Physics and Chemistry, 7, 1-10. doi: 10.4236/ampc.2017.71001.