High Stabilty and Low-Temperature Processed Perovskite Solar Cells
Zhongmin Zhou a, Liyuan Han a
a National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305, Japan
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Yokohama-shi, Japan, 2017 February 2nd - 4th
Organizers: Tsutomu Miyasaka and Iván Mora-Seró
Poster, Zhongmin Zhou, 114
Publication date: 7th November 2016

    Organolead triiodide perovskite (OTP)-based solar cells, as a promising low-cost photovoltaic (PV) devices, have attracted great research interest since they were reported by miyasaka et al. firstly in 2009. With the application of OTP in all-solid-state solar cells, variety of fabrication technology and interface engineering were developed to improve the power conversion efficiency (PCE). To date, the certificated PCE has come to 22.1%, which is on par with the best conventional thin-film PV devices.      

    The perovskite solar cells with high efficiencies, low cost, high stability, nontoxicity and reproducibility are our final goal to pursue. The charge transport layer plays a key role in protecting the perovskite photoactive layer from exposure to moisture and air, thus achieving highly stable perovskite-based photovoltaic cells.  Therefore, to select the optimal charge transport material has become crucial, not only for energy level matching and charge transport, but also to achieve high stability. Moreover, the interface deterioration by chemical reaction between the perovskite layer and the metal electrode (e.g., Al, Ag) in the ambient environment have been reported to dominate the initial degradation of perovskite solar cells, which occurs far ahead of the degradation of perovskite grains by moisture or heat. The selection of metal electrode is also very important for the stability of device.    

    Here, we report the high stabilty and low-temperature processed perovskite solar cells with graphene oxide (GO) as HTM and carbon as cathode, with the structure of  ITO/GO/MAPbI3/PCBM /Carbon. This construction shows great potential for the advancement of practical application of perovskite solar cells.



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