Facilitating Electron Transportation in Perovskite Solar Cells via Water-Soluble Fullerenol Interlayers

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• 作者：Tiantian Cao ; Zhaowei Wang ; Yijun Xia ; Bo Song ; Yi Zhou ; Ning Chen ; Yongfang Li
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：July 20, 2016
• 年：2016
• 卷：8
• 期：28
• 页码：18284-18291
• 全文大小：439K
• 年卷期：0
• ISSN：1944-8252

文摘

TiO₂ is widely used in perovskite solar cells (Pero-SCs), but its low electrical conductivity remains a drawback for application in electron transport layer (ETL). To overcome this problem, an easily accessible hydroxylated fullerene, fullerenol, was employed herein as ETL modified on ITO in n-i-p type (ITO as cathode) Pero-SCs for the first time. The results showed that the insertion of a single layer of fullerenol between perovskite and TiO₂ dramatically facilitates the charge transportation and decreases the interfacial resistance. As a consequence, the device performance was greatly improved, and a higher power conversion efficiency of 14.69% was achieved, which is ∼17.5% enhancement compared with that (12.50%) of the control device without the fullerenol interlayer. This work provides a new candidate of interfacial engineering for facilitating the electron transportation in Pero-SCs.