Biomimetic Mineralization Nucleation with Polymer Template Enabled High‐Performance Perovskite Solar Cells by Anti‐Solvent‐Free Technology
Abstract
AbstractNucleation regulation in the perovskite film‐forming process has been widely studied to optimize crystal quality and enable high‐efficiency perovskite solar cells (PVSCs) by an anti‐solvent‐free method. However, the vertical nucleation process is often difficult to control in anti‐solvent‐free preparation, due to the heterogeneous metal ion distribution and subsequent non‐uniform nucleation. Inspired by natural biomineralization mechanisms, this is pioneered that the introduction of a functional biopolymer carboxymethyl chitosan (CMC) at the buried interface of the perovskite layer, which would promote homogeneous vertical nucleation. Furthermore, CMC can improve perovskite film quality, passivate interfacial defects, and mitigate residual stresses. Finally, PVSCs with CMC prepared by anti‐solvent‐free method exhibit a remarkable PCE of 25.12%, ranking among the highest devices fabricated without anti‐solvent, while also exhibiting significantly improved stability. Encouragingly, the large‐area PVSCs (1 cm2) achieved an excellent PCE of 24%. This is believed that this work offers a robust strategy for optimizing anti‐solvent‐free fabrication processes for scalable and printable PVSCs.
Article Details
Authors (8)
Aihui Liang
College of Chemistry and Materials/Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, China
Chuizheng Feng
Institute of Polymer Optoelectronic Materials and Devices/State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou P. R. China
Yonglong Yang
College of Chemistry and Materials/Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education/National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University Nanchang P. R. China
JiaXin Liu
Jia Yang
Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry
Gang Xie
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science
Fei Huang
Yiwang Chen
College of Chemistry and Chemical Engineering/Film Energy Chemistry for Jiangxi Provincial Key Laboratory (FEC), Nanchang University, Nanchang, China.