[15p-A41-1~17] 12.5 Organic solar cells

▲ [15p-A41-1] Stability of Perovskite Solar Cells Under Continous Illumination

〇Said Kazaoui¹, Nobuko Onozawa-Komatsuzaki¹, Takashi Funaki¹, Zhiping Wang², Hideo Yamagishi³ (1.AIST-RCPV, 2.Uni. of Oxford (UK), 3.CEREBA)

Keywords:Perovskite, Solar Cell, Stability

Lead-halide perovskite solar cells are very promising because of their high power conversion efficiency and low-cost fabrication, but their stability and toxicity are crucial. We have investigated the stability under continuous illumination of the solar cells with the following structure Glass/FTO/TiO₂/CH₃NH₃PbI₃/HTL/Au (with HTL such as spiro-OMeTAD, PTAA, ZnPc) and Glass/ITO/HTL/CH₃NH₃PbI₃/PCBM(C₆₀)/BCP/Ag (with HTL such as NiO). In particular, we found that the latter is relatively more stable than the former including Glass/FTO/TiO₂/CH₃NH₃PbI₃/spiro-OMeTAD/Au. We speculate that the cause of the degradation under both UV light and bias is probably related to photochemical reaction at the interfaces ETL/CH₃NH₃PbI₃ and CH₃NH₃PbI₃/HTL as probed by EDX-SEM analysis. From these results, we understand that in order to improve the stability of perovskite solar cells, it is essential to introduce buffer layers. At this conference, we will present our recent experimental results and discuss the stability of CH₃NH₃PbI₃-based solar cells.