High-Performance Flexible Perovskite Solar Cells by Using a Combination of Ultrasonic Spray-Coating and Low Thermal Budget Photonic Curing

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• 作者：Sanjib Das ; Bin Yang ; Gong Gu ; Pooran C. Joshi ; Ilia N. Ivanov ; Christopher M. Rouleau ; Tolga Aytug ; David B. Geohegan ; Kai Xiao
• 刊名：ACS Photonics
• 出版年：2015
• 出版时间：June 17, 2015
• 年：2015
• 卷：2
• 期：6
• 页码：680-686
• 全文大小：570K
• ISSN：2330-4022

文摘

Realizing the commercialization of high-performance and robust perovskite solar cells urgently requires the development of economically scalable processing techniques. Here we report a high-throughput ultrasonic spray-coating (USC) process capable of fabricating perovskite film-based solar cells on glass substrates with a power conversion efficiency (PCE) as high as 13%. Perovskite films with high uniformity, crystallinity, and surface coverage are obtained in a single step. Moreover, we report USC processing on TiO₂/ITO-coated polyethylene terephthalate (PET) substrates to realize flexible perovskite solar cells with a PCE as high as 8.1% that are robust under mechanical stress. In this case, a photonic curing technique was used to achieve a highly conductive TiO₂ layer on flexible PET substrates for the first time. The high device performance and reliability obtained by this combination of USC processing with optical curing appear very promising for roll-to-roll manufacturing of high-efficiency, flexible perovskite solar cells.