Quasi‐2D Inorganic CsPbBr3 Perovskite for Efficient and Stable Light‐Emitting Diodes |
| |
| Authors: | Yuequn Shang Gang Li Weimin Liu Zhijun Ning |
| |
| Affiliation: | 1. School of Physical Science and Technology, ShanghaiTech University, Pudong, Shanghai, China;2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China;3. University of Chinese Academy of Sciences, Beijing, China |
| |
| Abstract: | Metal halide perovskites are rising as a competitive material for next‐generation light‐emitting diodes (LEDs). However, the development of perovskite LEDs is impeded by their fast carriers diffusion and poor stability in bias condition. Herein, quasi‐2D CsPbBr3 quantum wells homogeneously surrounded by inorganic crystalline Cs4PbBr6 of large bandgap are grown. The centralization of carriers in nanoregion facilitates radiative recombination and brings much enhanced luminescence quantum yield. The external quantum efficiency and luminescence intensity of the LEDs based on this nanocomposite are one order of magnitude higher than the conventional low‐dimensional perovskite. Meanwhile, the use of inorganic nanocomposite materials brings much improved device operation lifetime under constant electrical field. |
| |
| Keywords: | CsPbBr3 inorganic nanocomposites LEDs low‐dimensional perovskite stability |
|
|
