摘要
Two-dimensional(2D) lead halide perovskite materials are emerging as one of promising light-absorbing materials in perovskite solar cells(PSCs), which show outstanding stability and defect passivation. Unfortunately, the power conversion efficiency(PCE) of those stable 2D PSCs is still far behind that of 3D PSCs. Herein, we reported a simple in-situ growth technique for the ethylenediamine lead iodide(EDAPbI4) layer on the top of formamidinium lead iodide(FAPbI3) layer. The rationally designed layered architecture of2D-3 D perovskite film could improve the PCE of the PSCs. In addition, benefiting from the high moisture resistance and inhibited ion migration of EDAPbI4 layer, the 2D-3D-based devices showed obviously enhanced long-term stability,keeping the initial PCE value for 200 h and 90% of its initial PCE even after 500 h.
二维(2D)卤化铅钙钛矿材料是钙钛矿太阳能电池(PSC)中最有前途的吸光材料之一,具有优异的稳定性和缺陷钝化作用.然而,这些稳定的二维PSC的转换效率仍远远落后于三维钙钛矿电池.在本文中我们通过原位生长的方法将2D EDAPbI4层成功制备在3D FAPbI3层表面。这种合理设计的2D-3D钙钛矿薄膜分层结构可以明显提高电池的效率.另外,由于EDAPbI4层的高抗湿性和抑制迁移, 2D-3D电池器件显示出明显增强的长期稳定性,在200 h内一直保持初始转换效率,甚至在500 h后仍能保持其初始转化效率的90%.
作者
Ya-Han Wu
Yong Ding
Xiao-Yan Liu
Xi-Hong Ding
Xue-Peng Liu
Xu Pan
Song-Yuan Dai
吴雅罕;丁勇;刘晓燕;丁希宏;刘雪鹏;潘旭;戴松元(Beijing Key Laboratory of Novel Thin-Film Solar Cells,North China Electric Power University,Beijing 102206,China;Key Laboratory of Photovolatic and Energy Conservation Materials,Institute of Applied Technology,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;School of Economics and Management,North China Electric Power University,Beijing 102206,China)
基金
supported by the National Key Research and Development Program of China (2016YFA0202400)
the 111 Project (B16016)
the National Natural Science Foundation of China (51572080, 51702096 and U1705256)
the Fundamental Research Funds for the Central Universities (2018ZD07, 2017MS021 and 2019MS027)
the Double Top Construction Program of North China Electric Power University (XM1805314)
