“Reinforced concrete”-like flexible transparent electrode for organic solar cells with high efficiency and mechanical robustness  

作　　者：Yang Chen Juanyong Wan Guiying Xu Xiaoxiao Wu Xinqi Li Yunxiu Shen Fu Yang Xuemei Ou Yaowen Li Yongfang Li 

机构地区：[1]Laboratory of Advanced Optoelectronic Materials,Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou,215123,China [2]State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials,Jiangsu Key Laboratory of Advanced Functional Polymer Dsign and Application,Soochow University,Suzhou,215123,China [3]Beijing National Laboratory for Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing,100190,China

出　　处：《Science China Chemistry》2022年第6期1164-1172,共9页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (51922074, 22075194, 51820105003);the National Key Research and Development Program of China(2020YFB1506400);the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (20KJA430010);the Tang Scholar;the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD);Collaborative Innovation Center of Suzhou Nano Science and Technology。

摘　　要：Flexible transparent electrodes(FTEs) with robust mechanical stability are crucial for the industrial application of flexible organic solar cells(OSCs). However, their production remains challenging owing to the difficulty in balancing the conductivity,transmittance, and adhesion of FTEs to substrates. Herein, we present the so-called “reinforced concrete” strategy which finetunes the structure of silver nanowires(Ag NWs)-based FTEs with polydopamine(PDA) possessing good adhesion properties and moderate reducibility. The PDA reduces Ag+to form silver nanoparticles(Ag NPs) which grow like “rivets” at the Ag NW junction sites;PDA stabilizes the Ag NW skeleton and improves the adhesion between the Ag NWs and polyethylene terephthalate(PET) substrate and interface layer. The obtained Ag NW:PDA:Ag NP FTE exhibits excellent optoelectronic properties and high mechanical stability. The resulting flexible OSCs exhibit 17.07% efficiency, high flexibility during 10,000 bending test cycles, and robust peeling stability. In addition, this “reinforced concrete”-like FTE provides great advantages for the production of large-area flexible OSCs, thereby paving a new way toward their commercial application.

关 键 词：flexible organic solar cells flexible transparent electrodes silver nanowires POLYDOPAMINE mechanical stability 

分 类 号：TM914.4[电气工程—电力电子与电力传动] O646.54[理学—物理化学]