非晶-多晶结构实现高效稳定的锡基钙钛矿太阳能电池。
Efficient and stable tin perovskite solar cells enabled by amorphous-polycrystalline structure.
作者信息
Liu Xiao, Wang Yanbo, Wu Tianhao, He Xin, Meng Xiangyue, Barbaud Julien, Chen Han, Segawa Hiroshi, Yang Xudong, Han Liyuan
机构信息
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, China.
Photovoltaic Materials Group, Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science, Tsukuba, Ibaraki, 305-0047, Japan.
出版信息
Nat Commun. 2020 May 29;11(1):2678. doi: 10.1038/s41467-020-16561-6.
Tin perovskite solar cells (TPSCs) have triggered intensive research as a promising candidate for lead-free perovskite solar cells. However, it is still challenging to obtain efficient and stable TPSCs because of the low defects formation energy and the oxidation of bivalent tin; Here, we report a TPSC with a stable amorphous-polycrystalline structure, which is composed of a tin triple-halide amorphous layer and cesium-formamidinium tin iodide polycrystals. This structure effectively blocks the outside oxygen, moisture and also suppresses the ion diffusion inside the devices. In addition, its energy level benefits the charge extraction and transport in TPSCs. This design enabled us to obtain the certified quasi-steady-state efficiency over 10% for TPSCs from an accredited certification institute. The cell was stable, maintaining 95% of the initial PCE after operation at the maximum power point under AM 1.5 G simulated solar light (100 mWcm) for 1000 hours.
锡基钙钛矿太阳能电池（TPSCs）作为无铅钙钛矿太阳能电池的一个有前途的候选者引发了广泛的研究。然而，由于缺陷形成能低和二价锡的氧化，获得高效且稳定的TPSCs仍然具有挑战性。在此，我们报道了一种具有稳定非晶-多晶结构的TPSC，它由锡三卤化物非晶层和铯-甲脒碘化锡多晶组成。这种结构有效地阻挡了外部的氧气、水分，还抑制了器件内部的离子扩散。此外，其能级有利于TPSCs中的电荷提取和传输。这种设计使我们能够从一家认可的认证机构获得认证的TPSCs准稳态效率超过10%。该电池稳定，在AM 1.5 G模拟太阳光（100 mW/cm²）下最大功率点运行1000小时后，仍保持初始光电转换效率（PCE）的95%。
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