Slot-die coated scalable hole transporting layers for efficient perovskite solar modules,Journal of Materials Chemistry A

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Slot-die coated scalable hole transporting layers for efficient perovskite solar modules
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-11-11 , DOI: 10.1039/d2ta07989e
Huiyu Yin _{1,

2} , Pin Lv ₁ , Biao Gao ₃ , Yuxi Zhang _{1,

2} , Yanqing Zhu _{1,

2} , Min Hu ₃ , Boer Tan ₄ , Mi Xu ₂ , Fuzhi Huang _{2,

5} , Yi-Bing Cheng _{2,

5} , Alexandr N. Simonov ₆ , Jianfeng Lu _{1,

2}

Affiliation

Scaling up high-performance perovskite solar cells (PSCs) while avoiding losses in the power conversion efficiency (PCE) is a challenging task. Deposition of high quality large-area hole transporting layers (HTLs) which are indispensable for efficient operation of PSCs, is often hard to achieve by scalable techniques. To address this, we demonstrate herein the fabrication of large-area (up to 30 cm²) organic-semiconductor-based HTL films using slot-die coating – an established and highly scalable printing technology that enables deposition of uniform thin films on various substrates. To achieve the highest performance, we developed a solvent engineering method to control the film formation process. Specifically, the combination of rapidly evaporating ethyl acetate and slowly evaporating chlorobenzene solvents allows for fine tuning the spreading and evaporation rate of the precursor solution over the substrate. Slot-die coating of solutions with optimal solvent composition, determined through detailed optimization studies, produces highly uniform and pinhole-free films, which proved effective hole extraction and suppress interfacial recombination. As a result, an average efficiency of 17.7 ± 1.5% is demonstrated for perovskite solar modules of 5 cm × 5 cm in size using a 10.0 cm² aperture area under AM 1.5G irradiation. Moreover, the modules retain 85% of their initial performance after being aged under dark ambient conditions for 1000 h.

中文翻译：

用于高效钙钛矿太阳能组件的狭缝涂层可扩展空穴传输层

在避免功率转换效率 (PCE) 损失的同时扩大高性能钙钛矿太阳能电池 (PSC) 是一项具有挑战性的任务。高质量大面积空穴传输层 (HTL) 的沉积对于 PSC 的高效运行必不可少，但通常很难通过可扩展技术实现。为了解决这个问题，我们在此展示了大面积（高达 30 cm ²) 基于有机半导体的 HTL 薄膜使用槽模涂层——一种成熟且高度可扩展的印刷技术，能够在各种基板上沉积均匀的薄膜。为了实现最高性能，我们开发了一种溶剂工程方法来控制成膜过程。具体来说，快速蒸发的乙酸乙酯和缓慢蒸发的氯苯溶剂的组合允许微调前体溶液在基板上的扩散和蒸发速率。通过详细的优化研究确定的具有最佳溶剂成分的溶液的狭缝模头涂布可产生高度均匀且无针孔的薄膜，证明有效的孔提取和抑制界面复合。因此，平均效率为 17.7 ± 1。AM 1.5G照射下的^{2孔径面积。}此外，在黑暗环境条件下老化 1000 小时后，模块仍保持其初始性能的 85%。

更新日期：2022-11-11

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