具有大幅降低铅含量的高效钙钛矿太阳能电池。
Highly Efficient Perovskite Solar Cells with Substantial Reduction of Lead Content.
作者信息
Liu Chong, Fan Jiandong, Li Hongliang, Zhang Cuiling, Mai Yaohua
机构信息
Institute of Photovoltaics, College of Physics Science and Technology, Hebei University, Baoding, 071002, China.
Institute of New Energy Technology, College of Information and Technology, Jinan University, Guangzhou, 510632, China.
出版信息
Sci Rep. 2016 Oct 18;6:35705. doi: 10.1038/srep35705.
Despite organometal halide perovskite solar cells have recently exhibited a significant leap in efficiency, the Sn-based perovskite solar cells still suffer from low efficiency. Here, a series homogeneous CHNHPbSnI (0 ≤ x ≤ 1) perovskite thin films with full coverage were obtained via solvent engineering. In particular, the intermediate complexes of PbI/(SnI)∙(DMSO) were proved to retard the crystallization of CHNHSnI, thus allowing the realization of high quality Sn-introduced perovskite thin films. The external quantum efficiency (EQE) of as-prepared solar cells were demonstrated to extend a broad absorption minimum over 50% in the wavelength range from 350 to 950 nm accompanied by a noteworthy absorption onset up to 1050 nm. The CHNHPbSnI perovskite solar cells with inverted structure were consequently realized with maximum power conversion efficiency (PCE) of 14.12%.
尽管有机金属卤化物钙钛矿太阳能电池最近在效率上有了显著飞跃，但基于锡的钙钛矿太阳能电池效率仍然较低。在此，通过溶剂工程获得了一系列具有全覆盖的均匀CHNHPbSnI（0≤x≤1）钙钛矿薄膜。特别地，已证明PbI/(SnI)∙(DMSO)的中间络合物会延缓CHNHSnI的结晶，从而实现高质量的引入锡的钙钛矿薄膜。所制备太阳能电池的外量子效率（EQE）在350至950nm波长范围内显示出在50%以上的宽吸收最小值，同时在高达1050nm处有显著的吸收起始。因此，实现了具有倒置结构的CHNHPbSnI钙钛矿太阳能电池，最大功率转换效率（PCE）为14.12%。
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