Abstract Metal perovskite halides have led to the development of light-emitting diodes due to their excellent optical and electrical properties. However, compared to near-infrared, red, and green perovskite light-emitting diodes, blue-emitting light-emitting diodes lag far behind in development due to poor stability and low quantum efficiency. In this review, the latest advances in blue perovskite light-emitting diodes are described, including three-dimensional perovskites, two-dimensional/quasi-two-dimensional perovskites, and perovskite nanocrystals. In the three-dimensional perovskite section, the choices of halide perovskite composition, electron transport layer and hole transport layer enable tunable light emission from sky blue to dark blue. In the two-dimensional/quasi-two-dimensional perovskite discussion, the co-surfactant colloid chemistry, and component engineering precisely control the stacking number, which produces a significant blue shift by quantum confinement effects. In the perovskite nanocrystal section, the selection of organic ligands and inorganic passivation are the key strategies to keep the nanocrystal structure stable and fully passivate surface defects. In each section, the present situation and major challenges are overviewed. Next, the evolutions of the methods to overcome these challenges and the most important breakthroughs are highlighted. In conclusion, future directions that may improve the performance of blue perovskite light-emitting diodes are discussed.

中文翻译：

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蓝色钙钛矿发光二极管 (LED)：小型回顾

摘要 金属钙钛矿卤化物由于其优异的光学和电学性能而推动了发光二极管的发展。然而，与近红外、红光和绿光钙钛矿发光二极管相比，蓝光发光二极管由于稳定性差和量子效率低而在发展上远远落后。在这篇综述中，描述了蓝色钙钛矿发光二极管的最新进展，包括三维钙钛矿、二维/准二维钙钛矿和钙钛矿纳米晶体。在三维钙钛矿部分，卤化物钙钛矿成分、电子传输层和空穴传输层的选择能够实现从天蓝色到深蓝色的可调光发射。在二维/准二维钙钛矿讨论中，助表面活性剂胶体化学和组件工程精确控制堆叠数，通过量子限制效应产生显着的蓝移。在钙钛矿纳米晶部分，有机配体的选择和无机钝化是保持纳米晶结构稳定和完全钝化表面缺陷的关键策略。每个部分都概述了现状和主要挑战。接下来，重点介绍克服这些挑战的方法的演变以及最重要的突破。总之，讨论了可能提高蓝色钙钛矿发光二极管性能的未来方向。在钙钛矿纳米晶部分，有机配体的选择和无机钝化是保持纳米晶结构稳定和完全钝化表面缺陷的关键策略。每个部分都概述了现状和主要挑战。接下来，重点介绍克服这些挑战的方法的演变以及最重要的突破。总之，讨论了可能提高蓝色钙钛矿发光二极管性能的未来方向。在钙钛矿纳米晶部分，有机配体的选择和无机钝化是保持纳米晶结构稳定和完全钝化表面缺陷的关键策略。每个部分都概述了现状和主要挑战。接下来，重点介绍克服这些挑战的方法的演变以及最重要的突破。总之，讨论了可能提高蓝色钙钛矿发光二极管性能的未来方向。重点介绍了克服这些挑战的方法的演变以及最重要的突破。总之，讨论了可能提高蓝色钙钛矿发光二极管性能的未来方向。重点介绍了克服这些挑战的方法的演变以及最重要的突破。总之，讨论了可能提高蓝色钙钛矿发光二极管性能的未来方向。