Homogeneous permeation and oriented crystallization in nanostructured mesopores for efficient and stable printable mesoscopic perovskite solar cells  

作　　者：Guodong Zhang Yanjie Cheng Tingting Niu Ziwei Zheng Zongwei Li Junwei Xiang Qiaojiao Gao Minghao Xia Lijuan Guo Yiming Liu Mengru Zhang Yiran Tao Xueqin Ran Mingjie Li Guichuan Xing Yingdong Xia Lingfeng Chao Anyi Mei Hongwei Han Yonghua Chen 

机构地区：[1]Key Laboratory of Flexible Electronics(KLoFE)and Institute of Advanced Materials(IAM),School of Flexible Electronics(Future Technologies),Nanjing Tech University,Nanjing 211816,China [2]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,China [3]Department of Physics,The Chinese University of Hong Kong,New Territories,Hong Kong SAR 999077,China [4]Department of Applied Physics,The Hong Kong Polytechnic University,Kowloon 999077,China [5]Shenzhen Research Institute,The Hong Kong Polytechnic University,Shenzhen 518057,China [6]Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macao,Avenida da Universidade,Taipa 999078,China

出　　处：《Science China Chemistry》2024年第11期3688-3696,共9页中国科学（化学英文版）

基　　金：financially supported by the Natural Science Foundation of China (62288102, 22379067, 52172198, 61705102, 62205142 and 52302266);the National Key R&D Program of China (2023YFB4204500);the Jiangsu Provincial Departments of Science and Technology (BE2022023, BK20220010, and BZ2023060);the Innovation Project of Optics Valley Laboratory (OVL2021BG006);the Open Project Program of Wuhan National Laboratory for Optoelectronics (2021WNLOKF003);the Natural Science Basic Research Plan in Shaanxi Province of China (2021JLM-43);the Joint Research Funds of Department of Science & Technology of Shaanxi Province and Northwestern Polytechnical University (2020GXLH-Z-007 and 2020GXLH-Z-014)。

摘　　要：The low-cost and scalable printable mesoporous perovskite solar cells(p-MPSCs) face significant challenges in regulating perovskite crystal growth due to their nanoscale mesoporous scaffold structure, which limits the improvement of device power conversion efficiency(PCE). In particular, the most commonly used solvents, N,N-dimethylformamide(DMF) and dimethyl sulfoxide(DMSO), have a single chemical interaction with the precursor components and high volatility, which is insufficient to self-regulate the perovskite crystallization process, leading to explosive nucleation and limited growth within mesoporous scaffolds. Here, we report a mixed solvent system composed of methylamine formaldehyde(MAFa)-based ionic liquid and acetonitrile(ACN) with the strong C=O–Pb coordination and N–H···I hydrogen bonding with perovskite components. We found that the mixed solvent system is beneficial for the precursor solution to homogeneously penetrate into the mesoporous scaffold,and the strong C=O–Pb coordination and N–H···I hydrogen bonding interaction can promote the oriented growth of perovskite crystals. This synergistic effect increased the PCE of the p-MPSCs from 17.50% to 19.21%, which is one of the highest records for p-MPSC in recent years. Additionally, the devices exhibit positive environmental stability, retaining over 90% of the original PCE after 1,200 h of aging under AM 1.5 illumination conditions at 55 ℃ and 55% humidity.

关 键 词：printable mesoscopic perovskite solar cells ionic liquid crytallization control hight efficiency and stability 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]