Bio-inspired vertebral design for scalable and flexible perovskite solar cells

作者：Xiangchuan Meng, Zheren Cai, Yanyan Zhang, Xiaotian Hu, Zhi Xing, Zengqi Huang, Zhandong Huang, Yongjie Cui, Ting Hu, Meng Su, Xunfan Liao, Lin Zhang, Fuyi Wang, Yanlin Song, Yiwang Chen · 发表于：Nature Communications · 年份：2020 · DOI：10.1038/s41467-020-16831-3 · 被引用次数：274 · 研究领域：Perovskite Materials and Applications、Conducting polymers and applications、Quantum Dots Synthesis And Properties

Abstract The translation of unparalleled efficiency from the lab-scale devices to practical-scale flexible modules affords a huge performance loss for flexible perovskite solar cells (PSCs). The degradation is attributed to the brittleness and discrepancy of perovskite crystal growth upon different substrates. Inspired by robust crystallization and flexible structure of vertebrae, herein, we employ a conductive and glued polymer between indium tin oxide and perovskite layers, which simultaneously facilitates oriented crystallization of perovskite and sticks the devices. With the results of experimental characterizations and theoretical simulations, this bionic interface layer accurately controls the crystallization and acts as an adhesive. The flexible PSCs achieve the power conversion efficiencies of 19.87% and 17.55% at effective areas of 1.01 cm2 and 31.20 cm2 respectively, retaining over 85% of original efficiency after 7000 narrow bending cycles with negligible angular dependence. Finally, the modules are assembled into a wearable solar-power source, enabling the upscaling of flexible electronics.