Organic light-emitting diodes (OLEDs) have become the cutting-edge technology in the display market. However, compared with green and red stacks, blue stacks still remain an obstacle for OLED technology. There seems to be an “impossible trinity” between efficiency, stability, and color-purity for blue OLEDs. In this trilemma, advances in device stability have lagged far behind. In this Perspective, focusing on the critical role of bond-dissociation energy (BDE), we first summarize recent advances in the chemical degradation mechanism of high-efficiency blue OLED materials and then highlight strategies to improve the intrinsic stability and device lifetime from the material point-of-view. Finally, future challenges and opportunities for developing robust blue OLED materials and devices are envisioned, including the rational design of robust blue materials with high BDEs, two-pronged approaches from both thermodynamic and kinetic aspects, the great need for robust host materials, deep insights into host–guest interactions, collaborative efforts from the aspect of devices, and data-driven screening and iteration development.

中文翻译：

---

蓝光 OLED 的效率、稳定性和色彩纯度之间“不可能的三位一体”：挑战和机遇


有机发光二极管 （OLED） 已成为显示器市场的前沿技术。然而，与绿色和红色堆栈相比，蓝色堆栈仍然是 OLED 技术的障碍。蓝色 OLED 的效率、稳定性和色彩纯度之间似乎存在“不可能的三位一体”。在这三难困境中，设备稳定性的进步远远落后。在本期文章中，我们着眼于键解离能 （BDE） 的关键作用，首先总结了高效蓝色 OLED 材料化学降解机理的最新进展，然后从材料的角度强调了提高本征稳定性和器件寿命的策略。最后，展望了开发稳健性蓝色 OLED 材料和器件的未来挑战和机遇，包括具有高 BDE 的稳健蓝色材料的合理设计、热力学和动力学方面的双管齐下的方法、对稳健宿主材料的巨大需求、对主客体相互作用的深刻洞察、器件方面的协作努力，以及数据驱动的筛选和迭代开发。