Proceedings of nanoGe Fall Meeting19 (NFM19)
DOI: https://doi.org/10.29363/nanoge.nfm.2019.193
Publication date: 18th July 2019
All inorganic perovskites hold the promise to solve the thermal-stability issue embedded by the organic-inorganic lead halide perovskites, such as methylammonium lead iodide perovskite, and have the ideal optical bandgap for the top cell in a tandem structure with silicon or CIGS cell, thus have become one of the hottest research field in the recent two years. Here, we explored the deposition process, precursors and substrates used for the all inorganic perovskite solar cells. Advanced techniques such as synchrontron-based nano-x-ray fluorescence, GIWAXS, time-resolved/steady state photoluminescence spectroscopy and impedance spectroscopy show that halide segregation is one of the reasons that limit the efficiency and stability of perovskite solar cells. Moreover, we demonstrated that the fast annealing process would effectively solve this issue and give a highly stable perovskite solar cells with an efficiency of 13%. The accelerated ageing measurement show that our devices hold 90% of the initial efficiency after 10,000 hours constant illumination at 1 Sun (AM 1.5G, 100 mW/cm2).
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