Ren Miao, Cao Sheng, Zhao Jialong, Zou Bingsuo, Zeng Ruosheng
School of Physical Science and Technology, MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, Guangxi University, Nanning, 530004, People's Republic of China.
Nanomicro Lett. 2021 Aug 2;13(1):163. doi: 10.1007/s40820-021-00685-5.
Two-dimensional (2D) perovskites are known as one of the most promising luminescent materials due to their structural diversity and outstanding optoelectronic properties. Compared with 3D perovskites, 2D perovskites have natural quantum well structures, large exciton binding energy (E) and outstanding thermal stability, which shows great potential in the next-generation displays and solid-state lighting. In this review, the fundamental structure, photophysical and electrical properties of 2D perovskite films were illustrated systematically. Based on the advantages of 2D perovskites, such as special energy funnel process, ultra-fast energy transfer, dense film and low efficiency roll-off, the remarkable achievements of 2D perovskite light-emitting diodes (PeLEDs) are summarized, and exciting challenges of 2D perovskite are also discussed. An outlook on further improving the efficiency of pure-blue PeLEDs, enhancing the operational stability of PeLEDs and reducing the toxicity to push this field forward was also provided. This review provides an overview of the recent developments of 2D perovskite materials and LED applications, and outlining challenges for achieving the high-performance devices.
二维（2D）钙钛矿因其结构多样性和出色的光电性能而被认为是最有前途的发光材料之一。与三维（3D）钙钛矿相比，二维钙钛矿具有天然的量子阱结构、大的激子结合能（E）和出色的热稳定性，这在下一代显示器和固态照明中显示出巨大潜力。在这篇综述中，系统地阐述了二维钙钛矿薄膜的基本结构、光物理和电学性质。基于二维钙钛矿的优势，如特殊的能量漏斗过程、超快的能量转移、致密的薄膜和低效率滚降，总结了二维钙钛矿发光二极管（PeLEDs）的显著成就，并讨论了二维钙钛矿面临的令人兴奋的挑战。还展望了进一步提高纯蓝色PeLEDs的效率、增强PeLEDs的工作稳定性以及降低毒性以推动该领域向前发展。这篇综述概述了二维钙钛矿材料和LED应用的最新进展，并概述了实现高性能器件所面临的挑战。
