A facile spray-assisted fabrication of homogenous flat CH3NH3PbI3 films for high performance mesostructure perovskite solar cells
A facile spray-assisted fabrication of homogenous flat CH3NH3PbI3 films for high performance mesostructure perovskite solar cells
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DOI：
10.1016/j.matlet.2015.05.106
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发表时间：
2015-10
影响因子：
3
通讯作者：
Faming Li;Chunxiong Bao;Hao Gao;Weidong Zhu;Tao Yu;Jie Yang;G. Fu;Xiaoxin Zhou;Z. Zou
中科院分区：
文献类型：
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作者：
Faming Li;Chunxiong Bao;Hao Gao;Weidong Zhu;Tao Yu;Jie Yang;G. Fu;Xiaoxin Zhou;Z. Zou
CH3NH3PbI3光吸收层的均匀覆盖对于高性能金属-有机卤化物钙钛矿太阳能电池(PSC)至关重要。在这里，我们发现一种简单的喷雾辅助工艺取代了通常使用的两步旋涂工艺中的浸渍工艺，可以有效地降低粗糙度(均方根仅为16 nm)，提高光吸收层的覆盖率，并消除层中的针孔。实验结果表明，喷雾辅助工艺使PSC的平均开路电压从0.823±0.105 V提高到0.940±0.008 V。这得益于空穴传输材料(HTM)和介孔二氧化钛(TiO2)层之间的低泄漏可能性，因为成功地形成了光滑的无针孔的光吸收层。最终，介观结构PSCs的平均功率转换效率可提高约25%。
A homogenous coverage of the CH3NH3PbI3light absorption layer is crucially important for a high-performance metal–organic halide perovskite solar cell (PSC). Herein, we found that a facile spray-assisted process instead of the commonly used dipping process in a two-step spin-coating method can effectively reduce the roughness (of RMS only 16 nm), enhance the coverage of the light absorption layer and eliminate the pinholes in the layer. The experimental results demonstrated that the PSC's average open-circuit voltage (Voc) has been raised up from 0.823±0.105 V to 0.940±0.008 V by the spray-assisted process. It benefits from the low leakage possibility between the hole-transport-material (HTM) and the mesoporous TiO2layer when a smooth and pinhole-free light absorption layer has successfully formed. Finally the average power conversion efficiencies of the mesostructure PSCs could be promoted by 25% approximately.