Quantum dots (QDs) light-emitting diodes (QLEDs) are gaining significant interest for the next generation of display and lighting applications because of their wide color gamut, cost-effective solution processability, and good stability. The last decades have witnessed rapid advances in improving their efficiency and lifetime. So far, among the three primary colors of QLEDs devices, the performance of blue QLEDs is considerably inferior to that of green and red ones including Cd-based and Cd-free devices, which is a key bottleneck hindering QLEDs’ application. This mini-review describes recent advances of blue Cd-based and Cd-free QLEDs from materials to device engineering, in particular, elaborating the essential factors that limit their performance and the degradation mechanisms. We also discuss the progress and challenges of large-scale displays. Finally, we propose possible approaches to improve the performance of the blue QLEDs, including QDs materials and device architecture optimization, and summarize potential applications in this stimulating field.

中文翻译：

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面向全彩显示器的蓝色量子点发光二极管：材料、器件和大规模制造


量子点 （QD） 发光二极管 （QLED） 因其宽色域、经济高效的解决方案加工性和良好的稳定性而受到下一代显示和照明应用的极大关注。过去几十年见证了其效率和使用寿命的快速进步。到目前为止，在 QLED 器件的三基色中，蓝色 QLED 的性能远逊于绿色和红色，包括基于 Cd 和无 Cd 的器件，这是阻碍 QLED 应用的关键瓶颈。本小型综述描述了基于蓝色 Cd 和无 Cd 的 QLED 从材料到器件工程的最新进展，特别是阐述了限制其性能的基本因素和降解机制。我们还讨论了大型显示器的进展和挑战。最后，我们提出了提高蓝色 QLED 性能的可能方法，包括 QD 材料和器件架构优化，并总结了该刺激领域的潜在应用。