Compositional engineering of organic-inorganic metal halide perovskite allows for improved optoelectrical properties, however, phase segregation occurs during crystal nucleation and limits perovskite solar cell device performance. Herein, we show that by applying tetrabutylammonium bistriflimide as an additive in the perovskite precursor solution, ultra-uniform perovskite crystals are obtained, which effectively increases device performance. As a result, power conversion efficiencies (PCEs) of 24.5% in a cell and 21.2% in a module are achieved, together with high stability under illumination, humidity and elevated thermal conditions.

中文翻译：

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在四丁基铵双三氟甲酰亚胺存在下形成的超均匀钙钛矿晶体可提供高效稳定的钙钛矿太阳能电池


有机-无机金属卤化物钙钛矿的组成工程可以改善光电性能，然而，晶体成核过程中会发生相分离，限制了钙钛矿太阳能电池器件的性能。在此，我们表明，通过在钙钛矿前驱体溶液中应用四丁基铵双三氟甲酰亚胺作为添加剂，可以获得超均匀的钙钛矿晶体，从而有效提高器件性能。因此，电池的功率转换效率 (PCE) 为 24.5%，模块的功率转换效率为 21.2%，并且在光照、湿度和高温条件下具有高稳定性。