The rapid development of perovskite solar cells (PSCs) makes it one of the most competitive photovoltaic devices in the field of new energy. However, the suboptimal performance and poor stability caused by numerous defects are still the main factors limiting the development of PSCs. Herein, a polarized molecule additive of 4-(aminomethyl) benzonitrile hydrochloride (AMBNCl) is introduced into perovskite. Owing to its special polar electron density distribution, −C≡N group, −NH₃⁺ terminal, and Cl^– ions, the modification of AMBNCl can improve the quality of perovskite crystal growth, passivate the defects of Pb²⁺, adjust the energy level array between the perovskite layer and hole-transport layer, and alleviate the carrier nonradiative recombination. As a result, the AMBNCl-modified device achieves a champion efficiency of 23.52%. The unpacked device still maintained 91.2% of its original efficiency after storing in an air environment (RH ∼40%, 25 °C) for 50 days.

中文翻译：

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用于高效稳定钙钛矿太阳能电池的极化分子 4-（氨基甲基）苯甲腈盐酸盐

钙钛矿太阳能电池（PSCs）的快速发展使其成为新能源领域最具竞争力的光伏器件之一。然而，众多缺陷导致的性能欠佳和稳定性差仍然是限制PSCs发展的主要因素。在此，将 4-(氨基甲基) 苯甲腈盐酸盐 (AMBNCl) 的极化分子添加剂引入钙钛矿中。由于其特殊的极性电子密度分布、-C≡N基团、-NH ₃ ⁺末端和Cl ^-离子，AMBNCl的改性可以提高钙钛矿晶体的生长质量，钝化Pb ^{2+的缺陷。}，调整钙钛矿层和空穴传输层之间的能级阵列，缓解载流子非辐射复合。结果，经过 AMBNCl 修饰的设备实现了 23.52% 的冠军效率。拆封后的设备在空气环境（RH~40%，25°C）中存放 50 天后仍保持其原始效率的 91.2%。