Efficient planar perovskite solar cells with large fill factor and excellent stability
Efficient planar perovskite solar cells with large fill factor and excellent stability
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具有大填充因子和优异稳定性的高效平面钙钛矿太阳能电池
DOI：
10.1016/j.jpowsour.2015.07.081
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发表时间：
2015-11-30
影响因子：
9.2
通讯作者：
Yang, Renqiang
中科院分区：
文献类型：
--
作者：
Bao, Xichang;Wang, Yujin;Yang, Renqiang
钙钛矿薄膜的质量和稳定性对于使用该技术的太阳能电池至关重要。在这里，我们通过在γ-丁内酯和二甲基亚砜的混合物中引入少量的N-甲基-2-吡咯烷酮来制备高质量的CH_3 NH_3 PbI_3钙钛矿薄膜。钙钛矿膜由具有不清楚边界的致密晶粒（平均尺寸类似于57 nm）组成，其显示出具有均方根粗糙度仅为2.39 nm的镜面状表面。在100 mW cm ~（-2）光照下，功率转换效率为11.77%，填充因子高达80.52%。此外，通过形成具有优异表面的致密钙钛矿膜，钙钛矿太阳能电池的稳定性大大提高。结果表明，具有致密晶粒的高质量钙钛矿薄膜是高稳定性、高效率钙钛矿太阳能电池的有希望的选择。(C)2015 Elsevier B. V.版权所有。
The quality and stability of perovskite films are critical for solar cells using this technology. Here, we fabricate a high-quality CH3NH3PbI3 perovskite film by introducing small amounts of N-methyl-2-pyrrolidone into a Mixture of gamma-butyrolactone and dimethylsulphoxide. The perovskite film consists of compact grains (average sizes of similar to 57 nm) with unclear boundaries which show a mirror-like surface with the root mean square roughness of only 2.39 nm. The power conversion efficiency of 11.77% is obtained with the fill factor as high as 80.52% under one sun illumination (100 mW cm(-2)). Furthermore, the stability of the perovskite solar cells is greatly improved by forming compact perovskite films with excellent surfaces. The results indicate that high-quality perovskite films with compact grains are a promising choice for high-stable, efficient perovskite solar cells. (C) 2015 Elsevier B.V. All rights reserved.