High-Quality Perovskite Films Grown with a Fast Solvent-Assisted Molecule Inserting Strategy for Highly Efficient and Stable Solar Cells
High-Quality Perovskite Films Grown with a Fast Solvent-Assisted Molecule Inserting Strategy for Highly Efficient and Stable Solar Cells
复制标题
采用快速溶剂辅助分子插入策略生长的高质量钙钛矿薄膜，可实现高效稳定的太阳能电池
DOI：
10.1021/acsami.6b06847
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发表时间：
2016-08-31
影响因子：
9.5
通讯作者：
Cao, Bingqiang
中科院分区：
文献类型：
--
作者：
Yuan, Shuai;Qiu, Zhiwen;Cao, Bingqiang
由于钙钛矿膜的形貌控制，有机卤化物钙钛矿型太阳能电池的性能得到了显著的提高。在本文中，我们提出了一种快速溶剂辅助分子插入法(S-AMI)来制备高质量的钙钛矿薄膜。在该方法中，甲基碘化铵/异丙醇(MAI/异丙醇)溶液被旋涂在二甲基甲酰胺(DMF)润湿的混合卤化铅(PbX2)前驱体薄膜上。DMF可以帮助MAI分子插入到PbX2前驱体薄膜中，并为钙钛矿薄膜的颗粒生长提供了一个溶剂环境。采用S-阿米法生长的钙钛矿型薄膜由于晶界的减少，具有较大的晶粒尺寸和良好的取向，且载流子寿命较长。用这些钙钛矿薄膜构建的太阳能电池产生了超过17%的平均效率，以及80%的高平均填充系数。此外，这些未密封的太阳能电池装置在环境大气中表现出良好的稳定性。
The performance of organolead halide perovskites based solar cells has been enhanced dramatically due to the morphology control of the perovskite films. In this paper, we present a fast solvent-assisted molecule inserting (S-AMI) strategy to grow high-quality perovskite film, in which the methylammonium iodide/2-propanol (MAI/IPA) solution is spin-coated onto a dimethyl-formamide (DMF) wetted mixed lead halide (PbX2) precursor film. The DMF can help the inserting of MAI molecules into the PbX2 precursor film and provide a solvent environment to help the grain growth of the perovskite film. The perovskite film grown by the S-AMI approach shows large and well-oriented grains and long carrier lifetime due to the reduced grain boundary. Solar cells constructed with these perovskite films yield an average efficiency over 17% along with a high average fill factor of 80%. Moreover, these unsealed solar cell devices exhibit good stability in an ambient atmosphere.