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The Effect of Hydrophobicity of Ammonium Salts on Stability of Quasi‐2D Perovskite Materials in Moist Condition
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-04-17 , DOI: 10.1002/aenm.201800051 Haiying Zheng 1, 2 , Guozhen Liu 1, 2 , Liangzheng Zhu 1, 2 , Jiajiu Ye 1, 2 , Xuhui Zhang 1, 2 , Ahmed Alsaedi 3 , Tasawar Hayat 3, 4 , Xu Pan 1 , Songyuan Dai 1, 3, 5
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-04-17 , DOI: 10.1002/aenm.201800051 Haiying Zheng 1, 2 , Guozhen Liu 1, 2 , Liangzheng Zhu 1, 2 , Jiajiu Ye 1, 2 , Xuhui Zhang 1, 2 , Ahmed Alsaedi 3 , Tasawar Hayat 3, 4 , Xu Pan 1 , Songyuan Dai 1, 3, 5
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With the potential of achieving high efficiency and low production costs, perovskite solar cells (PSCs) have attracted great attention. However, their unstableness under moist condition has retarded the commercial development. Recently, 2D perovskites have received a lot of attention due to their high moisture resistance. In this work, four quasi 2D quasi perovskites are prepared, then their stability under moist condition is investigated. The surface morphology, crystal structure, optical properties, and photovoltaic performance are measured. Among the four quasi‐2D perovskites, (C6H5CH2NH3)2(FA)8Pb9I28 has the best performance: uniform and dense film, extremely well‐oriented crystal structure, strong absorption, and a high power conversion efficiency (PCE) of 17.40%. The aging tests show that quasi‐2D perovskites are more stable under moist conditions than FAPbI3 is. The (C6H5CH2NH3)2(FA)8Pb9I28 quasi‐2D perovskite devices exhibit high humidity stability, maintaining 80% of the starting PCE after 500 h under 80% relative humidity. Compared with other quasi‐2D perovskites, (C6H5CH2NH3)2(FA)8Pb9I28 has the highest humidity stability, due to their strongest hydrophobicity from C6H5CH2NH3+. This work demonstrates that the properties of perovskite materials can be modified by adding different ammonium salts into FAPbI3. Thus, by introducing ammonium salts with high hydrophobic properties the fabrication of highly efficient and stable 2D PSCs may be possible.
中文翻译：
铵盐的疏水性对湿态准2D钙钛矿材料稳定性的影响
钙钛矿太阳能电池（PSC）具有实现高效率和降低生产成本的潜力，因此备受关注。然而，它们在潮湿条件下的不稳定性阻碍了商业发展。近年来，二维钙钛矿因其高耐湿性而备受关注。在这项工作中，制备了四种准二维准钙钛矿，然后研究了它们在潮湿条件下的稳定性。测量了表面形态，晶体结构，光学性质和光伏性能。在四种准2D钙钛矿中，（C 6 H 5 CH 2 NH 3）2（FA）8 Pb 9 I 28具有最佳性能：均匀且致密的薄膜，极好的取向晶体结构，强吸收性以及17.40％的高功率转换效率（PCE）。老化测试表明，准2D钙钛矿在潮湿条件下比FAPbI 3更稳定。（C 6 H 5 CH 2 NH 3）2（FA）8 Pb 9 I 28准2D钙钛矿器件显示出高湿度稳定性，在80％相对湿度下500小时后仍保持80％的起始PCE。与其他准2D钙钛矿相比（C 6 H 5 CH 2 NH 3）2（FA）8 Pb 9 I 28具有最高的湿度稳定性，因为它们来自C 6 H 5 CH 2 NH 3 +的疏水性最强。这项工作表明，可以通过向FAPbI 3中添加不同的铵盐来改变钙钛矿材料的性能。因此，通过引入具有高疏水性的铵盐，可以制造高效且稳定的2D PSC。
更新日期：2018-04-17
中文翻译：
铵盐的疏水性对湿态准2D钙钛矿材料稳定性的影响
钙钛矿太阳能电池（PSC）具有实现高效率和降低生产成本的潜力，因此备受关注。然而，它们在潮湿条件下的不稳定性阻碍了商业发展。近年来，二维钙钛矿因其高耐湿性而备受关注。在这项工作中，制备了四种准二维准钙钛矿，然后研究了它们在潮湿条件下的稳定性。测量了表面形态，晶体结构，光学性质和光伏性能。在四种准2D钙钛矿中，（C 6 H 5 CH 2 NH 3）2（FA）8 Pb 9 I 28具有最佳性能：均匀且致密的薄膜，极好的取向晶体结构，强吸收性以及17.40％的高功率转换效率（PCE）。老化测试表明，准2D钙钛矿在潮湿条件下比FAPbI 3更稳定。（C 6 H 5 CH 2 NH 3）2（FA）8 Pb 9 I 28准2D钙钛矿器件显示出高湿度稳定性，在80％相对湿度下500小时后仍保持80％的起始PCE。与其他准2D钙钛矿相比（C 6 H 5 CH 2 NH 3）2（FA）8 Pb 9 I 28具有最高的湿度稳定性，因为它们来自C 6 H 5 CH 2 NH 3 +的疏水性最强。这项工作表明，可以通过向FAPbI 3中添加不同的铵盐来改变钙钛矿材料的性能。因此，通过引入具有高疏水性的铵盐，可以制造高效且稳定的2D PSC。
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