Fabrication and characterization of perovskite CH3NH3Pb1-xSbxI3-3xBr3x photovoltaic devices
Jun Yamanouchi,Takeo Oku,Yuya Ohishi,Misaki Fukaya,Naoki Ueoka,Hiroki Tanaka,Atsushi Suzuki
Abstract
TiO2/CH3NH3Pb1-xSbxI3-3xBr3x-based photovoltaic devices were fabricated by a spin-coating method using mixture solutions with SbBr3. Effects of SbBr3, CsI or RbBr addition to CH3NH3PbI3 precursor solutions on the photovoltaic properties were investigated. The short-circuit current densities and photoconversion efficiencies were improved by adding a small amount of SbBr3, CsI or RbBr to the perovskite phase, which would be due to the doping effect of Sb, Br and Cs/Rb atom at the Pb, I and CH3NH3 sites, respectively.
