Recently, Cui Binbin's research group of the Advanced Research Institute of Multidisciplinary Sciences of Beijing Institute of Technology published in the international journal Advanced Optical Materials (IF: 9.926) in the field of materials and chemistry, with the title of Fabrication Strategies and Optoelectronic Applications of Perovskite Heterostructures, in which the latest research progress in the construction of metal halogen perovskite heterostructures (Fig. 1) and optoelectronic applications were summarized and discussed. Cheng Xiaohua, a 2020 doctoral student and Han Ying, a 2019 doctoral student of the Advanced Research Institute of Multidisciplinary Sciences of Beijing Institute of Technology, are the co first authors of the work, and the corresponding author is Cui Binbin, an associate researcher.

Figure 1. 3D and low-dimensional (0-2D) metal halide perovskite material structure simulation and schematic diagram of assembly in different dimensions

Metal halide perovskites (MHPs) are an emerging class of low-cost multifunctional semiconductor materials. They have been widely used in optoelectronic devices such as perovskite solar cells (PSCs), light-emitting diodes (LEDs), photodetectors, memristors, and lasers. However, perovskite materials are particularly sensitive to factors such as temperature, oxygen and moisture in the air, and the short service life caused by poor stability greatly limits their industrial application. At present, the development of new metal halide perovskite materials, passivation of defects, optimization of device structure, and good packaging are effective methods to improve the optoelectronic performance and stability of perovskite devices. In addition, the preparation of perovskite/perovskite heterostructures (PPHSs) can not only achieve passivation of perovskite material defects, tune the band gap, but also optimize the carrier transport mode for various semiconductor applications. Therefore, the preparation of perovskite/perovskite heterostructures is a novel and reliable method to obtain stable and excellent perovskite devices.

Since the respective advantages of two or more metal halide perovskite materials can be synthesized, perovskite heterostructures have received extensive attention from researchers. The research shows that the construction of perovskite / perovskite heterostructure can effectively improve the carrier migration of perovskite photoelectric functional devices, adjust the electron phonon coupling, significantly improving the environmental stability of the devices, greatly improving the possibility of industrial application of perovskite photoelectric functional devices. Therefore, summarizing and discussing the preparation strategies and development status of perovskite heterostructures is of great significance for the application of such composite structural materials with excellent optoelectronic properties. This article reviews the preparation strategies and optoelectronic applications of perovskite heterostructures in recent years. This paper focuses on the introduction of different morphologies (thin films and single crystals) and dimensions (2D/3D, 2D/2D, 3D/3D, 1D/3D, 0d/3D) and the preparation strategies of perovskite heterostructures, and summarizes the important applications and latest progress of perovskite heterostructures in solar cells, LEDs, photodetectors and lasers in recent years. Finally, the challenges faced in the preparation and application of perovskite heterostructures were summarized, and the future development prospects of perovskite heterostructures in optoelectronic functional devices were described.

Paper information: Xiaohua Cheng, Ying Han, Bin-Bin Cui*. Fabrication Strategies and Optoelectronic Applications of Perovskite Heterostructures, doi: 10.1002/adom.202102224.

Link to the paper: https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.202102224

About the author:

Cui Binbin, a member of the Jiusan Society, obtained his doctorate from the Institute of chemistry of the Chinese Academy of Sciences in 2016 and visited Nanyang Technology University in Singapore from September 2015 to April 2016. He is currently a pre-appointed assistant professor (special associate researcher) and doctoral supervisor of the Advanced Research Institute of Multidisciplinary Sciences, Beijing Institute of Technology. His main research direction is organic-inorganic hybrid photoelectric functional materials. A series of important research progress has been made in "efficient and stable organic-inorganic hybrid metal halogen perovskite photovoltaic devices" and "structure and photoelectric function regulation of low dimensional organic-inorganic hybrid perovskite crystal materials", such as energy & environ Sci., 2020, 13, 4344-4352； Adv. Sci., 2021, 8, 2004805; Nat. Commun., 2019, October, 5190-5198, etc. In recent years, he has published more than 30 research papers in Energy & Environ Sci., Nat. Commun., J. Am. Chem. Soc., Angew. Chem. Int. Ed., Adv. SCI and other journals. He presided over the National Natural Science Foundation of China General and Youth Fund projects.