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Stable Perovskite Solar Cells Based on Direct Surface Passivation Employing 2D Perovskites
Solar RRL ( IF 6.0 ) Pub Date : 2023-09-28 , DOI: 10.1002/solr.202300572 Milon Kundar 1, 2 , Prasun Kumar 3 , Satinder Kumar Sharma 4 , Ranbir Singh 3 , Suman Kalyan Pal 1, 2
Solar RRL ( IF 6.0 ) Pub Date : 2023-09-28 , DOI: 10.1002/solr.202300572 Milon Kundar 1, 2 , Prasun Kumar 3 , Satinder Kumar Sharma 4 , Ranbir Singh 3 , Suman Kalyan Pal 1, 2
Affiliation
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Surface passivation of 3D perovskites with highly stable 2D perovskite is an effective strategy to improve both performance and stability of perovskite solar cells (PSCs). Herein, a new approach has been employed for the synthesis of oleic acid and octylamine-assisted 2D perovskites TEA2PbX4 (X = I, Br) in antisolvent and directly used them for the surface passivation of MAFAPbI3 (3D) perovskite. The grain boundary and interface are both optimized in 3D/2D perovskite by 2D perovskite to improve surface morphology. It is found that the 2D perovskite effectively suppresses carrier recombination by reducing the defect density and facilitates interfacial charge extraction through better energy-level alignments. As a result, power conversion efficiency of PSCs is boosted up to 18.56% and 19.87% for passivation with TEA2PbI4 and TEA2PbBr4, respectively. The passivated perovskite devices exhibit good thermal, operational, and long-term stability in an ambient environment because of the material robustness of 3D/2D hybrid perovskites.
中文翻译：
基于二维钙钛矿直接表面钝化的稳定钙钛矿太阳能电池
用高度稳定的 2D 钙钛矿对 3D 钙钛矿进行表面钝化是提高钙钛矿太阳能电池（PSC）性能和稳定性的有效策略。在此，采用了一种新方法在反溶剂中合成油酸和辛胺辅助的2D钙钛矿TEA 2 PbX 4 (X = I, Br)，并直接将其用于MAFAPbI 3 (3D)钙钛矿的表面钝化。2D 钙钛矿对 3D/2D 钙钛矿的晶界和界面均进行了优化，以改善表面形貌。研究发现，二维钙钛矿通过降低缺陷密度有效抑制载流子复合，并通过更好的能级排列促进界面电荷提取。结果，经过TEA 2 PbI 4和TEA 2 PbBr 4钝化后，PSC的功率转换效率分别提高了18.56%和19.87%。由于 3D/2D 混合钙钛矿的材料稳健性，钝化钙钛矿器件在周围环境中表现出良好的热稳定性、操作稳定性和长期稳定性。
更新日期：2023-09-28
中文翻译：
基于二维钙钛矿直接表面钝化的稳定钙钛矿太阳能电池
用高度稳定的 2D 钙钛矿对 3D 钙钛矿进行表面钝化是提高钙钛矿太阳能电池（PSC）性能和稳定性的有效策略。在此，采用了一种新方法在反溶剂中合成油酸和辛胺辅助的2D钙钛矿TEA 2 PbX 4 (X = I, Br)，并直接将其用于MAFAPbI 3 (3D)钙钛矿的表面钝化。2D 钙钛矿对 3D/2D 钙钛矿的晶界和界面均进行了优化，以改善表面形貌。研究发现，二维钙钛矿通过降低缺陷密度有效抑制载流子复合，并通过更好的能级排列促进界面电荷提取。结果，经过TEA 2 PbI 4和TEA 2 PbBr 4钝化后，PSC的功率转换效率分别提高了18.56%和19.87%。由于 3D/2D 混合钙钛矿的材料稳健性，钝化钙钛矿器件在周围环境中表现出良好的热稳定性、操作稳定性和长期稳定性。
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