LAUSR

Organometallic halide perovskites, such as CH3NH3PbI3 (methylammonium lead iodide, herein called MAPbI) continue to draw great attention to the photovoltaic field as a promising candidate material for its cost-effectiveness and fast growing efficiency [1, 2]. Especially, Methyl-ammonium lead trihalide as light absorber (CH3NH3PbX3, where X is a halogen atom such as I, Br or Cl) with a bandgap of 1.5~2.3 eV depending on halide content has been studied intensively in many different types of platforms in recent years, in search for further breakthroughs in conversion efficiency [3]. However, the studies of long-term stability of such organic perovskites and their behavior under applied bias and extended photo-exposure, etc. have hitherto not been investigated at necessary details. In this study, we have probed the following configuration of the halide perovskite solar cell platform; going from the bottom to top in order is; glass, FTO, compact TiO2, mesoporous TiO2 with filled MAPBI, MAPBI, Spiro-OMeTAD, and top gold electrode.