Compact Layer Free Perovskite Solar Cells with a High-Mobility Hole-Transporting Layer

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• 作者：Qianqian Zhu ; Xichang Bao ; Jianhua Yu ; Dangqiang Zhu ; Meng Qiu ; Renqiang Yang ; Lifeng Dong
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：February 3, 2016
• 年：2016
• 卷：8
• 期：4
• 页码：2652-2657
• 全文大小：368K
• ISSN：1944-8252

文摘

A high-mobility diketopyrrolopyrrole-based copolymer (P) was employed in compact layer free CH₃NH₃PbI₃ perovskite solar cells as a hole-transporting layer (HTL). By using the P-HTL, the 6.62% device efficiency with conventional poly-3-hexylthiophene was increased to 10.80% in the simple device configuration (ITO/CH₃NH₃PbI₃/HTL/MoO₃/Ag). With improved short circuit current density, open circuit voltage, and fill factor, the higher power conversion efficiency of P-HTL device is ascribed to the higher carrier mobility, more suitable energy level, and lower interfacial charge recombination. Advantages of applying P-HTL to perovskite solar cells, such as low cost, low-temperature processing, and excellent performance with simple cell structure, exhibit a possibility for commercial applications.