基 于 准 二 维 钙 钛 矿 发 光 层 优 化 的 蓝 色 发 光 二 极 管 研 究 进 展

Metal halide perovskite materials have great potential for development in the fields of lighting，display，and other optoelectronics due to their simple preparation process and unique optoelectronic properties. Currently，perovskite light-emitting diodes（PeLEDs）have made some progress in the fields of green light and red light. However，there are still big challenges to realize high-efficiency blue PeLEDs. In recent years，researchers have realized the blue light modulation of perovskites mainly through two ways：component engineering and dimensional engineering. Among them，quasi-two-dimensional perovskite materials have self-assembled quantum well structures，which exhibit unique advantages in blue light emission. As a result，this paper summarizes the current progress related to quasi-two-dimensional perovskite blue light diodes. Firstly，the quasi-2D perovskite blue light material system is briefly introduced，and then the structure and optical properties of quasi-2D perovskite are described. Secondly，focusing on the light-emitting layer of the device，we systematically summarize the methods and strategies to improve the performance of the device and finally put forward a partial summary and outlook on the development of quasi-2D perovskite blue light diodes in anticipation of a continuous breakthrough in their performance.