| 초록 |
Lead halide perovskites solar cells (PSCs) exceeding 22 % in power conversion efficiency (PCE) have been fabricated with n-i-p architecture employing nanostructured-TiO2. In this configuration, high efficiencies over 20% have been achieved by great efforts to prepare a high quality perovskite film, which is sandwiched with the proper selective hole- or electron extraction layers. However, both high efficiency and long-term stability are currently required to meet a practical application for the commercial product. For this reason, recent great efforts have been devoted to development of hole transporting materials (HTMs) for p-type contact layer, as an alternative to commercial Spiro–OMeTAD, which has been widely used for highly efficient PSCs, but is considered as a main cause to give rise to a severe degradation of the device under a heat stress. Thus, in this work, we have introduced thermally stable and robust hole transporting materials into PSCs for efficient and stable PSCs. |
