首页|Tailored multifunctional hydrazine derivatives for efficient printable hole-conductive-free mesoscopic perovskite solar cells via enhancing defect passivation
Tailored multifunctional hydrazine derivatives for efficient printable hole-conductive-free mesoscopic perovskite solar cells via enhancing defect passivation
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The low-cost and easy large-scale fabrication advantages of printable mesoscopic perovskite solar cells(p-MPSCs)are overshadowed by their limited photovoltaic conversion efficiency(PCE).Here,we intro-duce the hydrazide derivative of 4-Hydroxybenzoylhydrazine(4-HBH)to improve the PCE of p-MPSCs by inducing enhanced defect passivation.Both carbonyl and hydrazine groups in hydrazide groups pre-sent strong interaction with perovskite.The hydroxyl group,as an electron donor group,increases the electron cloud density of the hydrazide group in 4-HBH under the conjugation of the benzene ring,and thus enhances its interaction with perovskite.Additionally,the hydroxy group itself interacts with perovskite and passivates defects synergistically.The hydrazine agents can also reduce I2 and suppress the loss of iodine in perovskite films,which inhibits the formation of iodine-related defects.Consequently,p-MPSCs with 4-HBH achieve a high PCE of 19.21％,and present well improved stability.
Printable mesoscopic perovskite solar cellsMultifunctional hydrazine derivativesCooperative coordinationConjugation redox activity
Minghao Xia、Ziwei Zheng、Yanjie Cheng、Chaoyang Wang、Zhaozhen Cui、Guodong Zhang、Jinwei Gong、Anyi Mei、Hongwei Han
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Michael Grätzel Center for Mesoscopic Solar Cells,Wuhan National Laboratory for Optoelectronics,Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China
Key Laboratory of Flexible Electronics(KLoFE)& Institute of Advanced Materials(IAM),School of Flexible Electronics(Future Technologies),Nanjing Tech University(NanjingTech),Nanjing 211816,Jiangsu,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China
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