Anionic surfactant anchoring enables 23.4%efficient and stable perovskite solar cells  

阴离子表面活性剂锚定实现23.4%转换效率的反式钙钛矿太阳能电池

作　　者：Tao Wang Tianshi Ye Liang Qiao Weiyu Kong Fang Zeng Yao Zhang Ruitian Sun Lin Zhang Han Chen Rongkun Zheng Xudong Yang 王涛;叶天时;乔亮;孔维瑜;曾芳;张尧;孙瑞田;张林;陈汉;郑荣坤;杨旭东(State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China;Center of Hydrogen Science,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Zhangjiang Institute for Advanced Study,Shanghai Jiao Tong University,Shanghai 201210,China;School of Physics,Sydney Nano Institute,The University of Sydney,Sydney NSW 2006,Australia)

机构地区：[1]State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China [2]Center of Hydrogen Science,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [3]Zhangjiang Institute for Advanced Study,Shanghai Jiao Tong University,Shanghai 201210,China [4]School of Physics,Sydney Nano Institute,The University of Sydney,Sydney NSW 2006,Australia

出　　处：《Science China Materials》2022年第12期3361-3367,共7页中国科学（材料科学（英文版）

基　　金：supported by the National Key Research and Development Program of China (2018YFB1500104);the National Natural Science Foundation of China (11574199 and 11911530142);Shanghai Pilot Program for Basic Research-Shanghai Jiao Tong University;the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning

摘　　要：Nonradiative recombination losses at defects in metal halide perovskite films are responsible for hindering the improvement of the photovoltaic performance and stability of perovskite solar cells(PSCs).Here,we report a feasible multifunctional additive strategy that uses cesium stearate to passivate defects in perovskite films and simultaneously enhances the tolerance to light and moisture stress.Nonradiative recombination losses are effectively suppressed in target films that exhibit improved crystallinity,low trap-state density,and enhanced carrier separation and transportation.The present strategy hence boosts the power conversion efficiency of the pi-n structured PSC to 23.41%.Our device also shows good stability in ambient air without encapsulation,maintaining 91.6%of the initial efficiency after 720 h.金属卤化物钙钛矿薄膜缺陷处的非辐射复合损失仍然是阻碍钙钛矿太阳能电池光伏性能和稳定性进一步提高的主要原因.本文中,我们报道了一种可行的多功能添加剂策略,通过使用硬脂酸铯来钝化钙钛矿薄膜中的缺陷,同时提高对光和湿度的耐受性.实验证明,目标薄膜中的非辐射复合损失得到了有效抑制,同时硬脂酸铯提高了薄膜结晶度,降低了陷阱态密度,增强了界面载流子的分离和传输.因此,本策略将p-i-n反式结构钙钛矿太阳能电池的功率转换效率提高到23.41%.该器件在没有封装的情况下以及潮湿空气中表现出良好的长期稳定性,在720 h后仍能保持初始效率的91.6%.

关 键 词：perovskite solar cells cesium stearate crystallization PASSIVATION stability 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB383.2[一般工业技术—材料科学与工程] TQ423.11[化学工程]