Molecular exchange and passivation at interface afford high-performing perovskite solar cells with efficiency over 24%

作     者：Jianjun Sun Wangchao Chen Yingke Ren Yunjuan Niu Zhiqian Yang Li'e Mo Yang Huang Zhaoqian Li Hong Zhang Linhua Hu Jianjun Sun;Wangchao Chen;Yingke Ren;Yunjuan Niu;Zhiqian Yang;Li'e Mo;Yang Huang;Zhaoqian Li;Hong Zhang;Linhua Hu

作者机构：Key Laboratory of Photovoltaic and Energy Conservation MaterialsInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031AnhuiChina School of Chemistry and Chemical EngineeringAnhui Province Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of TechnologyHefei 230009AnhuiChina College of ScienceHebei University of Science and TechnologyShijiazhuang 050018HebeiChina Hebei Computational Optical Imaging and Photoelectric Detection Technology Innovation CenterHebei International Joint Research Center for Computational Optical Imaging and Intelligent SensingSchool of Mathematics and Physics Science and EngineeringHebei University of EngineeringHandan 056038HebeiChina University of Science and Technology of Chin1Anhui 230026HefeiChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2023年第82卷第7期

页      面：219-227,I0005页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：supported by the National Key R&D Program of China(2019YFB1503200) the National Natural Science Foundation of China(52002105) the Key Research and Development Plan Project of Anhui Province(2022H11020014) the West Light Foundation of the Chinese Academy of Sciences(XAB2020YW11) the Collaborative Innovation Program of Hefei Science Center,CAS(2022HSC-CIP006) the Fundamental Research Funds for the Central Universities(JZ2021HGTB0105) the Hefei Institutes of Physical Science,Chinese Academy of Sciences Director’s Fund(YZJJ201902,YZJJZX202018) the Natural Science Foundation of Hebei Province(F2021208014) the Science and Technology Project of Hebei Education Department(QN2021063) the Science and Technology Research Project for the Colleges and Universities in Hebei Province(QN2022034) 

主　　题：Perovskite solar cell Anti-solvent 4 4′-Dinonyl-2 2′-dipyridine Optimized interfaceStability 

摘      要：The interface is crucial for perovskite solar cells(PSCs).However,voids at interfaces induced by the trapped hygroscopic dimethyl sulfoxide(DMSO)can reduce charge extraction and accelerate the film degradation,seriously damaging the efficiency and *** this work,4,4’-dinonyl-2,2’-dipyridine(DN-DP),a Lewis base with long alkyl chains is introduced to solve this *** calculated and experimental results confirm that the dipyridyl group on DN-DP can more strongly coordinate with Pb^(2+)than that of the S=O group on *** strong coordination effect plays a crucial role in removing the DMSO-based adduct and reducing the formation of *** to the electron-donating properties of pyridine,the existence of DN-DP in the perovskite film can passivate the defects and optimize the energy level alignment of the perovskite *** open-circuit voltage(VOC)of the DN-DP-based PSC is improved from 1.107 V(control device)to 1.153 V,giving rise to a power conversion efficiency(PCE)of24.02%.Furthermore,benefiting from the moisture resistance stemming from the hydrophobic nonyl group,the PCE retains 90.4%of the initial performance after 1000 h of storage in the ambient condition.