Abstract:The effects of SbI 3 , PbCl 2 , and NH 4 Cl addition to perovskite CH 3 NH 3 PbI 3 precursor solutions on photovoltaic properties were investigated. TiO 2 /CH 3 NH 3 Pb(Sb)I 3 (Cl)-based photovoltaic devices were fabricated by a spin-coating technique, and the microstructures of the devices were investigated by X-ray diffraction and scanning electron microscopy. Current density-voltage characteristics and incident photon-to-current conversion efficiencies were improved by a small amount of Sb-and Cl-doping, which resulted in improvement of the efficiencies of the devices. The structure analysis indicated formation of a homogeneous microstructure by NH 4 Cl addition with SbI 3 .
Effects of NH 4 Cl addition to perovskite CH 3 NH 3 PbI 3 precursor solutions on photovoltaic properties were investigated. TiO 2 / CH 3 NH 3 PbI 3 (Cl)-based photovoltaic devices were fabricated by a spin-coating technique, and the microstructures of the devices were investigated by X-ray diffraction and scanning electron microscopy. Current densityvoltage characteristics were improved by a small amount of Cl-doping, which resulted in improvement of the efficiencies of the devices. The structure analysis indicated formation of a homogeneous microstructure by NH 4 Cl addition to the perovskite phase, and formation of PbI 2 was suppressed by the NH 4 Cl addition.
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