Colloidal CuInS2 Quantum Dots as Inorganic Hole-Transporting Material in Perovskite Solar Cells

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• 作者：Mei Lv ; Jun Zhu ; Yang Huang ; Yi Li ; Zhipeng Shao ; Yafeng Xu ; Songyuan Dai
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 12, 2015
• 年：2015
• 卷：7
• 期：31
• 页码：17482-17488
• 全文大小：393K
• ISSN：1944-8252

文摘

To develop novel hole-transporting materials (HTMs) is an important issue of perovskite solar cells (PSCs), especially favoring the stability improvement and the cost reduction. Herein, we use ternary quantum dots (QDs) as HTM in mesoporous TiO₂/CH₃NH₃PbI₃/HTM/Au solar cell, and modify the surface of CuInS₂ QDs by cation exchange to improve the carrier transport. The device efficiency using CuInS₂ QDs with a ZnS shell layer as HTM is 8.38% under AM 1.5, 100 mW cm^鈥?. The electrochemical impedance spectroscopy suggested that the significantly enhanced performance is mainly attributed to the reduced charge recombination between TiO₂ and HTM. It paves a new pathway for the future development of cheap inorganic HTMs for the high efficiency PSCs.