Buried Interface Modification Strategy for Efficient Tin‐Based Perovskite Light‐Emitting Diodes
Abstract
Abstract Tin (Sn)‐based perovskites show great potential for environmentally friendly and high‐performance light‐emitting diodes (LEDs). However, the development of Sn‐based perovskite LEDs (PeLEDs) lags significantly behind that of lead‐based perovskites. This is mainly due to the faster crystallization rate of Sn‐based perovskites that leads to a higher defect density in Sn‐based perovskite films, thereby serious nonradiative recombination. Here, we demonstrated a buried interface modification (BIM) strategy to regulate the crystallization kinetics of Sn‐based perovskite films by using carboxylate as multifunctional surface modifiers. We reveal that the buried interface is critical to improve the nucleation and crystallization of Sn‐based perovskite films. As a result, efficient near‐infrared Sn‐based PeLEDs were achieved with an external quantum efficiency (EQE) of 11.9%. This work suggests an efficient and elegant route to obtain high‐performance Sn‐based perovskite films and devices.
Article Details
Authors (17)
Zheng Jiang
Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute
Jie Yang
Wenbin Wang
School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing
Yangyu Liu
National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures School of Physics Nanjing University Nanjing China
Yuhan Zhou
Department of Chemistry
Jing Xu
Wang Wang
Hongyao Ding
Jiangsu Collaborative Innovation Center for Advanced Inorganic Functional Composites, College of Materials Science and Engineering Nanjing Tech University Nanjing 211816 China
Ya Zhong
Jiangsu Collaborative Innovation Center for Advanced Inorganic Functional Composites, College of Materials Science and Engineering Nanjing Tech University Nanjing 211816 China
Haifeng Zhao
Sai Bai
Weidong Xu
University of Cambridge , , ,
Wing Chung Tsoi
SPECIFIC, Faculty of Science and Engineering, Swansea University, Bay Campus 2 , Swansea SA1 8EN,
Tao Yu
Chunxiong Bao
National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures School of Physics Nanjing University Nanjing China
Xiaodong Shen
Pengpeng Teng
Jiangsu Collaborative Innovation Center for Advanced Inorganic Functional Composites College of Materials Science and Engineering Nanjing Tech University Nanjing China