High‐Pressure Nitrogen‐Extraction and Effective Passivation to Attain Highest Large‐Area Perovskite Solar Module Efficiency,Advanced Materials

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High‐Pressure Nitrogen‐Extraction and Effective Passivation to Attain Highest Large‐Area Perovskite Solar Module Efficiency
Advanced Materials ( IF 27.4 ) Pub Date : 2020-10-20 , DOI: 10.1002/adma.202004979
Minyong Du _{1,

2} , Xuejie Zhu ₃ , Likun Wang ₁ , Hui Wang ₁ , Jiangshang Feng ₃ , Xiao Jiang ₁ , Yuexian Cao ₁ , Youming Sun ₁ , Lianjie Duan ₁ , Yuxiao Jiao ₁ , Kai Wang ₁ , Xiaodong Ren ₃ , Zhe Yan ₃ , Shuping Pang ₄ , Shengzhong (Frank) Liu _{1,

3}

Affiliation

Slot‐die coating holds advantages over other large‐scale technologies thanks to its potential for well‐controlled, high‐throughput, continuous roll‐to‐roll fabrication. Unfortunately, it is challenging to control thin.film uniformity over a large area while maintaining crystallization quality. Herein, by using a high‐pressure nitrogen‐extraction (HPNE) strategy to assist crystallization, a wide processing window in the well‐controlled printing process for preparing high‐quality perovskites is achieved. The yellow‐phase perovskite generated by the HPNE acts as a crucial intermediate phase to produce large‐area high‐quality perovskite film. Furthermore, an ionic liquid is developed to passivate the perovskite surface to reduce surface defect density and to suppress carrier recombination, resulting in significantly increased efficiency to 22.7%, the highest for large‐area fabrication. The strategies are successfully extended to large‐area device fabrication, making it possible to produce a 40 × 40 mm² module with stabilized PCE as high as 19.4%, the highest‐efficiency for a large‐area module to date.

中文翻译：

高压氮提取和有效钝化以获得最高的大面积钙钛矿太阳能电池组件效率

缝模涂布具有优于其他大规模技术的优势，这归因于其在可控，高产量，连续卷对卷制造中的潜力。不幸的是，在保持结晶质量的同时，在大范围内控制薄膜均匀性具有挑战性。在此，通过使用高压氮气萃取（HPNE）策略来辅助结晶，可以在控制良好的印刷过程中获得宽阔的加工窗口，以制备高质量的钙钛矿。HPNE生成的黄相钙钛矿是生产大面积高质量钙钛矿薄膜的关键中间相。此外，开发了一种离子液体来钝化钙钛矿表面，以降低表面缺陷密度并抑制载流子复合，从而将效率显着提高至22.7％，大面积制造最高。该策略已成功扩展到大面积器件制造，从而可以生产40×40 mm^2个模块的PCE稳定度高达19.4％，是迄今为止大面积模块的最高效率。

更新日期：2020-11-25

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