Light-emitting diodes based on II–VI semiconductor quantum dots (QDs) have attracted considerable attention due to their superior features of color tunability, high brightness, narrow emission bandwidths, solution processing capabilities and compatibility with flexible substrates. The efficiencies and stabilities of red and green quantum-dot light-emitting diodes (QLEDs) are close to the standard for commercial applications, while blue QLEDs lag behind in device efficiency and stability. This paper reviews the latest progress of blue luminescent materials and devices based on II–VI semiconductor QDs, covering the latest progress in the synthesis of blue QDs, device structures, carrier transport materials, interface regulation, and light outcoupling technology. Furthermore, the current problems and solutions of blue QLEDs are discussed, and the development and application prospects of blue QLEDs are summarized. Key issues and challenges associated with the application of QLEDs in flat-panel displays are also identified.

中文翻译：

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基于II-VI半导体量子点的蓝色发光二极管的研究进展与挑战

基于II–VI半导体量子点（QD）的发光二极管具有出色的色彩可调性，高亮度，窄发射带宽，解决方案处理能力以及与柔性基板的兼容性，因此备受关注。红色和绿色量子点发光二极管（QLED）的效率和稳定性接近商业应用的标准，而蓝色QLED在器件效率和稳定性方面落后。本文回顾了基于II-VI半导体QD的蓝色发光材料和器件的最新进展，涵盖了蓝色QD合成，器件结构，载流子传输材料，界面调节和光输出耦合技术方面的最新进展。此外，还讨论了蓝色QLED的当前问题和解决方案，总结了蓝色QLED的发展和应用前景。还确定了与QLED在平板显示器中的应用相关的关键问题和挑战。