聚乙烯亚胺包覆氧化锌电子传输材料的制备及其对有机光伏电池空气和紫外稳定性的增强效应  

Refinement of Polyethyleneimine-coated Zinc Oxide Electron Transport Material and Investigation of Its Enhancing Effect on Air and Ultraviolet Stability of Organic Photovoltaic Devices

作　　者：宋海涛 王宇 杨建胜 张小科 王忠强[1] 王华[1] 杨永珍[1] 魏昌庭 闫翎鹏 SONG Haitao;WANG Yu;YANG Jiansheng;ZHANG Xiaoke;WANG Zhongqiang;WANG Hua;YANG Yongzhen;WEI Changting;YAN Lingpeng(Key Laboratory of Interface Science and Engineering in Advanced Materials,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;MIIT Key Laboratory of Advanced Display Materials and Devices,School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]太原理工大学新材料界面科学与工程教育部重点实验室,山西太原030024 [2]太原理工大学材料科学与工程学院,山西太原030024 [3]南京理工大学材料科学与工程学院新型显示材料与器件工信部重点实验室,江苏南京210094

出　　处：《发光学报》2024年第7期1145-1155,共11页Chinese Journal of Luminescence

基　　金：国家自然科学基金(61904121);山西省基础研究计划项目(20210302123164);山西省回国留学人员科研资助项目(2020-051);山西省研究生教育创新项目(2022Y289);江苏省卓越博士后计划(2023ZB844);中国博士后面上项目(2023M731687)。

摘　　要：活性层与电极之间的界面层材料对有机太阳能电池(OSCs)至关重要,它直接影响器件的性能和稳定运行。作为一种广泛应用的电子传输材料,氧化锌(ZnO)纳米颗粒(NPs)较高的表面缺陷态易在表面吸附水氧,严重影响OSCs的效率和稳定性。因此,本文设计了一种既能钝化表面缺陷又能调节能级的聚乙烯亚胺(PEI)包覆ZnO NPs的协同策略,采用水热法成功合成了ZnO@PEI NPs,并将其作为电子传输层(ETL)应用于基于PM6∶BO-4Cl∶PC61BM的OSCs中。结果表明,使用ZnO@PEINPs作为ETL制备的光伏器件的光电转换效率(PCE)略有下降,但由于包覆的PEI钝化了ZnO表面缺陷,ZnO@PEI NPs器件展现出更好的空气和紫外稳定性。本研究提出了一个构建多功能、高稳定性ETL的有效策略,为实现高稳定OSCs提供了一条适用的新途径。The interfacial layer materials situated between the active layer and electrodes are critical aspect of or⁃ganic solar cells(OSCs),as they directly affect device performance and stability during operation.Zinc oxide(ZnO)nanoparticles(NPs)are commonly functioned as electron transport layer(ETL)materials.However,their high surface defect states and susceptibility to adsorbing water and oxygen can significantly impact the efficiency and stability of OSCs.To tackle this issue,a synergistic approach was adopted in this study by employing polyethylenei⁃mine(PEI)-coated ZnO NPs to passivate surface defects and regulate energy levels.The resulting ZnO@PEI NPs was successfully synthesized using a hydrothermal method and served as an ETL in PM6∶BO-4Cl∶PC61BM-based OSCs.The experimental results indicate that the photovoltaic devices prepared using ZnO@PEI NPs as the ETL ex⁃hibit a slight decrease in the power conversion efficiency(PCE).However,due to the encapsulated PEI effectively passivating the surface defects of ZnO,the ZnO@PEI NPs devices demonstrate enhanced air and ultraviolet stability.In conclusion,this study proposes an effective strategy for developing multifunctional and highly stable ETL,present⁃ing a new and practical approach to achieving highly stable OSCs.

关 键 词：有机太阳能电池 电子传输层 氧化锌纳米颗粒 聚乙烯亚胺 空气稳定性 紫外稳定性 

分 类 号：TM914.4[电气工程—电力电子与电力传动]