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Fluorocarbon Surfactant-Assisted Large-Area Uniform and Water-Resistant Perovskite Films for Efficient Photovoltaics
Solar RRL ( IF 6.0 ) Pub Date : 2023-06-07 , DOI: 10.1002/solr.202300302 Yutian Xu 1 , Xiaojie Wang 1 , Zuoming Jin 1 , Bin Li 2 , Wei An 1 , Qinghong Zhang 2 , Yichuan Rui 1
Solar RRL ( IF 6.0 ) Pub Date : 2023-06-07 , DOI: 10.1002/solr.202300302 Yutian Xu 1 , Xiaojie Wang 1 , Zuoming Jin 1 , Bin Li 2 , Wei An 1 , Qinghong Zhang 2 , Yichuan Rui 1
Affiliation
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Formamidinium (FA)-based lead triiodide perovskites are suitable light-absorbing materials for solar cells due to their narrow bandgap, long-range charge diffusion length, and excellent thermal stability. However, large-area uniformity and phase purity are still challenging issues in the two-step solution processed perovskite films because of the incomplete spreading/reacting of the organic amine salt solution. Herein, a novel multifunctional nonionic fluorocarbon surfactant (FS) is introduced to improve the crystallization of perovskites via the strategy of reducing the surface tension of the organic amine salt solution and facilitating the adequate binding of the organic amine salts with PbI2. Moreover, the FS additives effectively reduce residual PbI2; passivate the surface and interfacial defects of perovskites. The FS modified perovskite solar cells (PSCs) exhibit a champion power conversion efficiency (PCE) of 21.72% (0.16 cm2) with an enhanced stability, and the unencapsulated device maintains about 80% of the initial PCE even after 1000 h of storage. In addition, the larger PSCs with the active area of 1.00 cm2 deliver a peak PCE of 19.19%. Eventually, FS impedes moisture intrusion and effectively mitigates the decomposition of perovskite film. This work opens the way to explore large-area PSCs with high performance and long-term stability.
中文翻译：
用于高效光伏的氟碳表面活性剂辅助大面积均匀防水钙钛矿薄膜
甲脒（FA）基三碘化铅钙钛矿由于其窄带隙、长程电荷扩散长度和优异的热稳定性而成为适合太阳能电池的吸光材料。然而，由于有机胺盐溶液的铺展/反应不完全，大面积均匀性和相纯度仍然是两步溶液加工钙钛矿薄膜中的挑战性问题。在此，引入了一种新型多功能非离子氟碳表面活性剂（FS），通过降低有机胺盐溶液的表面张力并促进有机胺盐与PbI 2充分结合的策略来改善钙钛矿的结晶。此外，FS添加剂有效减少残留PbI 2; 钝化钙钛矿的表面和界面缺陷。FS修饰的钙钛矿太阳能电池（PSC）表现出21.72%（0.16 cm 2）的冠军功率转换效率（PCE），并且稳定性增强，并且未封装的器件即使在存储1000小时后仍保持初始PCE的约80%。此外，活性面积为1.00 cm 2的较大PSC的峰值PCE 为19.19%。最终，FS 阻止水分侵入并有效减轻钙钛矿薄膜的分解。这项工作为探索具有高性能和长期稳定性的大面积 PSC 开辟了道路。
更新日期：2023-06-07
中文翻译：
用于高效光伏的氟碳表面活性剂辅助大面积均匀防水钙钛矿薄膜
甲脒（FA）基三碘化铅钙钛矿由于其窄带隙、长程电荷扩散长度和优异的热稳定性而成为适合太阳能电池的吸光材料。然而，由于有机胺盐溶液的铺展/反应不完全，大面积均匀性和相纯度仍然是两步溶液加工钙钛矿薄膜中的挑战性问题。在此，引入了一种新型多功能非离子氟碳表面活性剂（FS），通过降低有机胺盐溶液的表面张力并促进有机胺盐与PbI 2充分结合的策略来改善钙钛矿的结晶。此外，FS添加剂有效减少残留PbI 2; 钝化钙钛矿的表面和界面缺陷。FS修饰的钙钛矿太阳能电池（PSC）表现出21.72%（0.16 cm 2）的冠军功率转换效率（PCE），并且稳定性增强，并且未封装的器件即使在存储1000小时后仍保持初始PCE的约80%。此外，活性面积为1.00 cm 2的较大PSC的峰值PCE 为19.19%。最终，FS 阻止水分侵入并有效减轻钙钛矿薄膜的分解。这项工作为探索具有高性能和长期稳定性的大面积 PSC 开辟了道路。
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