揭建胜教授与张秀娟教授合作在ACS Nano上发表论文

题目：

High-Luminance Microsized CH₃NH₃PbBr₃ Single-Crystal-Based Light-Emitting Diodes via a Facile Liquid-Insulator Bridging Route

作者：

Huanyu Zhang^{1 †}, Tingxiu Yu^1,†, Chaoqiang Wang^1,†, Ruofei Jia¹, Azhar Ali AyazPirzado^1,3, Di Wu⁴, Xiujuan Zhang^1,*, Xiaohong Zhang¹, and Jiansheng Jie^1,2,*

单位：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China

²Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, Macau SAR 999078, P. R. China

³Department of Electronic Engineering, Faculty of Engineering and Technology, University of Sindh, Jamshoro, Sindh 76080, Pakistan

⁴School of Physics and Microelectronics and Key Laboratory of Material Physics, Ministry of Education, Zhengzhou University, Zhengzhou, Henan 450052, P. R. China

摘要：

Micro-/nanosized organic–inorganic hybrid perovskite single crystals (SCs) with appropriate thickness and high crystallinity are promising candidates for high-performance electroluminescent (EL) devices. However, their small lateral size poses a great challenge for efficient device construction and performance optimization, causing perovskite SC-based light-emitting diodes (PSC-LEDs) to demonstrate poor EL performance. Here, we develop a facile liquid-insulator bridging (LIB) strategy to fabricate high-luminance PSC-LEDs based on single-crystalline CH₃NH₃PbBr₃ microflakes. By introducing a blade-coated poly(methyl methacrylate) (PMMA) insulating layer to effectively overcome the problems of leakage current and possible short circuits between electrodes, we achieve the reliable fabrication of PSC-LEDs. The LIB method also allows us to systematically boost the device performance through crystal growth regulation and device architecture optimization. Consequently, we realize the best CH₃NH₃PbBr₃ microflake-based PSC-LED with an ultrahigh luminance of 136100 cd m^–2 and a half-lifetime of 88.2 min at an initial luminance of ∼1100 cd m^–2, which is among the highest for organic–inorganic hybrid perovskite LEDs reported to date. Moreover, we observe the strong polarized edge emission of the microflake-based PSC-LEDs with a high degree of polarization up to 0.69. Our work offers a viable approach for the development of high-performance perovskite SC-based EL devices.

影响因子：

15.881

分区情况：

一区

链接：

https://pubs.acs.org/doi/10.1021/acsnano.2c00488