Monoammonium Porphyrin for Blade-Coating Stable Large-Area Perovskite Solar Cells with >18% Efficiency
Monoammonium Porphyrin for Blade-Coating Stable Large-Area Perovskite Solar Cells with >18% Efficiency
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一铵%20卟啉%20for%20刀片涂层%20稳定%20大面积%20钙钛矿%20太阳能%20Cells%20with%20>%2018%%20效率
DOI：
10.1021/jacs.9b01305
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发表时间：
2019-04-17
影响因子：
15
通讯作者：
Cao, Jing
中科院分区：
文献类型：
--
作者：
Li, Congping;Yin, Jun;Cao, Jing
钙钛矿薄膜的结晶和缺陷的有效控制是钙钛矿太阳能电池（PSC）性能和稳定性的关键因素，特别是对于大面积PSC器件的制备。在此，我们直接将类表面活性剂单铵锌卟啉（ZnP）化合物嵌入甲基铵（MA（+））碘化铅钙钛矿薄膜中，刮涂大面积均匀的钙钛矿薄膜，尺寸达16 cm（2）。刀片涂覆大面积（1.96 cm(2)）ZnP PSC 的效率史无前例地达到了 18.3%，而制造的小面积（0.1 cm(2)）器件的最佳效率高达 20.5%。详细分析证明了 ZnP 在钙钛矿表面和晶界的结晶控制和缺陷钝化中的作用。因此，ZnP封装的器件在85℃、湿度约45%的情况下运行1000小时后仍保留了90%以上的初始效率。这项研究提出了一种基于钙钛矿薄膜分子封装策略实现大面积涂层、形貌定制和缺陷抑制协同效应的简便方法，进一步提高PSC的光伏性能和稳定性。
Efficient control of crystallization and defects of perovskite films are the key factors toward the performance and stability of perovskite solar cells (PSCs), especially for the preparation of large-area PSCs devices. Herein, we directly embedded surfactant-like monoammonium zinc porphyrin (ZnP) compound into the methylammonium (MA(+)) lead iodide perovskite film to blade-coat large-area uniform perovskite films as large as 16 cm(2). Efficiency as high as 18.3% for blade-coating large-area (1.96 cm(2)) PSCs with ZnP was unprecedentedly achieved, while the best efficiency of fabricated small-area (0.1 cm(2)) device was up to 20.5%. The detailed analyses demonstrated the functions of ZnP in crystallization control and defects passivation of perovskite surfaces and grain boundaries. As a consequence, the ZnP-encapsulated devices retained over 90% of its initial efficiency after 1000 h with a humidity of about 45% at 85 degrees C. This research presents a facile way to achieve the synergistic effect of large area coating, morphology tailoring, and defect suppression based on the molecular encapsulation strategy for perovskite films, further improving the photovoltaic performance and stability of PSCs.