Working Mechanism for Flexible Perovskite Solar Cells with Simplified Architecture

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• 作者：Xiaobao Xu ; Qi Chen ; Ziruo Hong ; Huanping Zhou ; Zonghao Liu ; Wei-Hsuan Chang ; Pengyu Sun ; Huajun Chen ; Nicholas De Marco ; Mingkui Wang ; Yang Yang
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：October 14, 2015
• 年：2015
• 卷：15
• 期：10
• 页码：6514-6520
• 全文大小：444K
• ISSN：1530-6992

文摘

In this communication, we report an efficient and flexible perovskite solar cell based on formamidinium lead trihalide (FAPbI₃) with simplified configuration. The device achieved a champion efficiency of 12.70%, utilizing direct contact between metallic indium tin oxide (ITO) electrode and perovskite absorber. The underlying working mechanism is proposed subsequently, via a systematic investigation focusing on the heterojunction within this device. A significant charge storage has been observed in the perovskite, which is believed to generate photovoltage and serves as the driving force for charge transferring from the absorber to ITO electrode as well. More importantly, this simplified device structure on flexible substrates suggests its compatibility for scale-up fabrication, which paves the way for commercialization of perovskite photovoltaic technology.