Highly Efficient and Stable Perovskite Solar Cells by Interfacial Engineering Using Solution-Processed Polymer Layer
Highly Efficient and Stable Perovskite Solar Cells by Interfacial Engineering Using Solution-Processed Polymer Layer
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DOI：
10.1021/acs.jpcc.6b12137
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发表时间：
2017-01
影响因子：
3.7
通讯作者：
Feijiu Wang;A. Shimazaki;Fengjiu Yang;Kaito Kanahashi;K. Matsuki;Y. Miyauchi;T. Takenobu;A. Wakamiya-A
中科院分区：
文献类型：
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作者：
Feijiu Wang;A. Shimazaki;Fengjiu Yang;Kaito Kanahashi;K. Matsuki;Y. Miyauchi;T. Takenobu;A. Wakamiya-A
溶液处理的有机卤化铅钙钛矿太阳能电池在钙钛矿层中具有深针孔，导致设备中的分流泄漏。在此，我们报道了一种通过在钙钛矿层和空穴传输层之间插入溶液处理的聚合物层来改善钙钛矿太阳能电池性能的简便方法。通过掺入聚（甲基丙烯酸甲酯）（PMMA）聚合物层，钙钛矿太阳能电池的光伏转换效率增加到18.1%，并且在潮湿环境条件下暴露20天期间，稳定性仅降低约5%。具有PMMA层的器件的改善的光伏性能归因于从针孔、边界和钙钛矿层的表面状态的载流子复合损失的减少。这个简单的过程产生的显着增益支持使用这种策略在薄膜光电器件的进一步应用。
Solution-processed organo-lead halide perovskite solar cells with deep pinholes in the perovskite layer lead to shunt-current leakage in devices. Herein, we report a facile method for improving the performance of perovskite solar cells by inserting a solution-processed polymer layer between the perovskite layer and the hole-transporting layer. The photovoltaic conversion efficiency of the perovskite solar cell increased to 18.1% and the stability decreased by only about 5% during 20 days of exposure in moisture ambient conditions through the incorporation of a poly(methyl methacrylate) (PMMA) polymer layer. The improved photovoltaic performance of devices with a PMMA layer is attributed to the reduction of carrier recombination loss from pinholes, boundaries, and surface states of perovskite layer. The significant gain generated by this simple procedure supports the use of this strategy in further applications of thin-film optoelectronic devices.