Fast and Balanced Charge Transport Enabled by Solution-Processed Metal Oxide Layers for Efficient and Stable Inverted Perovskite Solar Cells

被引:24
作者
Zhang, Jing [1 ]
Mcgettrick, James [2 ]
Ji, Kangyu [3 ]
Bi, Jinxin [1 ]
Webb, Thomas [1 ]
Liu, Xueping [1 ]
Liu, Dongtao [1 ]
Ren, Aobo [1 ]
Xiang, Yuren [1 ]
Li, Bowei [1 ]
Stolojan, Vlad [1 ]
Watson, Trystan [2 ]
Stranks, Samuel D. [3 ,4 ]
Zhang, Wei [1 ]
机构
[1] Univ Surrey, Adv Technol Inst ATI, Guildford GU2 7XH, Surrey, England
[2] Swansea Univ, Coll Engn, SPECIFIC, Bay Campus, Swansea SA1 8EN, Wales
[3] Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England
[4] Univ Cambridge, Dept Chem Engn & Biotechnol, Philippa Fawcett Dr, Cambridge CB3 0AS, England
基金
英国工程与自然科学研究理事会; 欧洲研究理事会;
关键词
fast and balanced charge transfer; inverted perovskite solar cells; long-term stability; low-temperature processing; metal oxides; HIGH-PERFORMANCE; NICKEL-OXIDE; HIGHLY EFFICIENT; ROOM-TEMPERATURE; INTERFACE; STABILITY; METHANOFULLERENE; CONTACTS; FILMS;
D O I
10.1002/eem2.12595
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Metal oxide charge transport materials are preferable for realizing long-term stable and potentially low-cost perovskite solar cells (PSCs). However, due to some technical difficulties (e.g., intricate fabrication protocols, high-temperature heating process, incompatible solvents, etc.), it is still challenging to achieve efficient and reliable all-metal-oxide-based devices. Here, we developed efficient inverted PSCs (IPSCs) based on solution-processed nickel oxide (NiOx) and tin oxide (SnO2) nanoparticles, working as hole and electron transport materials respectively, enabling a fast and balanced charge transfer for photogenerated charge carriers. Through further understanding and optimizing the perovskite/metal oxide interfaces, we have realized an outstanding power conversion efficiency (PCE) of 23.5% (the bandgap of the perovskite is 1.62 eV), which is the highest efficiency among IPSCs based on all-metal-oxide charge transport materials. Thanks to these stable metal oxides and improved interface properties, ambient stability (retaining 95% of initial PCE after 1 month), thermal stability (retaining 80% of initial PCE after 2 weeks) and light stability (retaining 90% of initial PCE after 1000 hours aging) of resultant devices are enhanced significantly. In addition, owing to the low-temperature fabrication procedures of the entire device, we have obtained a PCE of over 21% for flexible IPSCs with enhanced operational stability.
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页数:9
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