Solution-processed CuO_x as an efficient hole-extraction layer for inverted planar heterojunction perovskite solar cells

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• 作者：Zhi-Kai Yu ; Wei-Fei Fu ; Wen-Qing Liu ; Zhong-Qiang Zhang ; Yu-Jing Liu ; Jie-Lin Yan ; Tao Ye ; Wei-Tao Yang ; Han-Ying Li ; Hong-Zheng Chen ; ^{hzchen@zju.edu.cn}
• 关键词：CuOx ; Solution-processing ; Hole-transporting layer ; Perovskite solar cells ; Stable
• 刊名：Chinese Chemical Letters
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：1
• 页码：13-18
• 全文大小：1128 K
• 卷排序：28

文摘

A solution-processed CuOx film has been successfully integrated as the hole-transporting layer (HTL) for inverted planar heterojunction perovskite solar cells (PVSCs). The CuOx layer is fabricated by simply spin-coating a copper acetylacetonate (Cu(acac)2) chloroform solution onto ITO glass with high transparency in the visible range. The compact and pinhole-free perovskite film with large grain domains is grown on the CuOx film. The inverted PVSCs with the structure of ITO/CuOx/MAPbI3/PC61BM/ZnO/Al are fabricated and show a best PCE of 17.43% under standard AM 1.5G simulated solar irradiation with a VOC of 1.03 V, a JSC of 22.42 mA cm−2, and a fill factor of 0.76, which is significantly higher and more stable than that fabricated from the often used hole-transporting material PEDOT:PSS (11.98%) under the same experimental conditions. The enhanced performance is attributed to the efficient hole extraction through the CuOx layer as well as the high-quality CH3NH3PbI3 films grown on the CuOx. Our results indicate that low-cost and solution-processed CuOx film is a promising HTL for high performance PVSCs with better stability.