Li Qing, Zheng Yichu, Wang Haonan, Liu Xinyi, Lin Miaoyu, Sui Xinyuan, Leng Xuesong, Liu Da, Wei Zhanpeng, Song Mengyao, Li Dongdong, Yang Hua Gui, Yang Shuang, Hou Yu
Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China.
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, China.
Science. 2025 Mar 7;387(6738):1069-1077. doi: 10.1126/science.adu5563. Epub 2025 Mar 6.
The lattice deformation and structural evolution of perovskite films in response to electric fields, temperature, and light limit the operational endurance of solar cells. We mechanically reinforced perovskite thin films by integrating a polymer-coupled monolithic single-layer graphene interface that led to a twofold enhancement in modulus and hardness. The synergistic effect of graphene and poly(methyl methacrylate) restricted photoinduced lattice expansion and decreased the deformation ratio from 0.31 to 0.08%, which minimized the structural damage caused by dynamic lattice evolution. Solar cell devices maintained >97% of their initial power conversion efficiency after maximum power point tracking for >3670 hours under full-spectrum air mass 1.5 global (AM 1.5 G) sunlight at 90°C.
钙钛矿薄膜在电场、温度和光照作用下的晶格变形和结构演变限制了太阳能电池的运行耐久性。我们通过集成聚合物耦合的单片单层石墨烯界面来机械增强钙钛矿薄膜，这使模量和硬度提高了两倍。石墨烯和聚甲基丙烯酸甲酯的协同效应限制了光致晶格膨胀，并将变形率从0.31%降低到0.08%，从而将动态晶格演变造成的结构损伤降至最低。在90°C的全光谱空气质量1.5全球（AM 1.5 G）太阳光下进行最大功率点跟踪超过3670小时后，太阳能电池器件保持了其初始功率转换效率的97%以上。
