Spontaneously supersaturated nucleation strategy for high reproducible and efficient perovskite solar cells
Spontaneously supersaturated nucleation strategy for high reproducible and efficient perovskite solar cells
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DOI：
10.1016/j.cej.2020.126998
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发表时间：
2021-02
影响因子：
15.1
通讯作者：
Bo Li;Qiqi Zhang;Song Zhang;Zachary Ahmad;Tamuka Chidanguro;Andrew Hunter Davis;Y. C. Simon;X. Gu;Weiwei Zheng;N. Pradhan;Qilin Dai
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文献类型：
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作者：
Bo Li;Qiqi Zhang;Song Zhang;Zachary Ahmad;Tamuka Chidanguro;Andrew Hunter Davis;Y. C. Simon;X. Gu;Weiwei Zheng;N. Pradhan;Qilin Dai
高质量的钙钛矿薄膜主要通过反溶剂辅助旋涂法制备。但器件尺寸小、操作窗口窄限制了其在实际生产中的应用。在这里，自发过饱和成核策略被开发用于在没有任何反溶剂的情况下制备高质量的钙钛矿薄膜。在成膜初期，甲胺乙醇的挥发可以引发前驱体溶液的快速沉淀行为，形成均匀致密的中间相薄膜。通过退火相变可以制备出大面积（10 cm × 10 cm）的微米级晶粒的钙钛矿型MAPbI 3薄膜。0.1 cm 2钙钛矿太阳能电池（PSC）的平均功率转换效率（PCE）为19.4%。1 cm 2器械的PCE为17.57%，在相对湿度为5- 30%的空气中老化39天后保持96.8%。基于我们的策略制备的钙钛矿薄膜的钙钛矿模块表现出13.13%的PCE。在这项工作中开发的钙钛矿薄膜的制造方法显示出由于自发成核过程的制造过程的高再现性。同时，它在可扩展的溶液加工沉积技术应用于PSC商业化方面也表现出巨大的潜力。
High-quality perovskite films are predominantly prepared by anti-solvent assisted spin-coating method. However, small device size and narrow operation window limit their applications in practical and scalable production. Here, a spontaneously supersaturated nucleation strategy is developed to fabricate high-quality perovskite films without any antisolvents. The rapid precipitation behavior of the precursor solutions could be triggered by the volatilization of methylamine ethanol at the initial film formation stage, forming uniform and compact intermediate phase films. Mirror-like large area (10 cm × 10 cm) methylammonium lead triiodide (MAPbI3) perovskite films with micrometer-sized grains can be achieved by phase transition via annealing. The average power conversion efficiency (PCE) of 19.4% is achieved for 0.1 cm2perovskite solar cells (PSCs). The 1 cm2device shows a PCE of 17.57% and retains 96.8% after aging for 39 days in the air with a relative humidity of 5–30%. The perovskite module based on the perovskite films prepared by our strategy exhibits a PCE of 13.13%. The perovskite film fabrication method developed in this work shows high reproducibility of the fabrication process due to the spontaneous nucleation process. Meanwhile, it also exhibits significant potential in the application of scalable solution processing deposition techniques toward the commercialization of PSCs.