深圳大学杨楚罗课题组在研究中取得进展。他们提出，高功率效率和超长寿命的白色有机发光二极管由强大的蓝色多共振TADF发射器赋能。相关论文发表在2025年2月11日出版的《光：科学与应用》杂志上。

据了解，白色有机发光二极管（WOLEDs）作为下一代光致发光器件显示出非常好的前景，但由于缺乏能够捕获所有三态（T1）激子的稳定蓝色发射器，实现高能效（PE）和长使用寿命仍然具有挑战性。

研究人员建议将稳定的天蓝色多共振热激活延迟荧光（MR-TADF）发射器，集成到三色混合WOLEDs中来解决这些问题。通过精心选择MR-TADF发射体和精确调整激子复合区，优化后的BCzBN-3B三色器件实现了色稳定的白光发射，最大外量子效率（EQEmax）和最大PE （PEmax）分别为34.4%和101.8 μ mW1。

此外，LT90（定义为亮度在1000cdm2下下降到初始值90%的时间）达到761小时。采用该策略开发的具有深蓝发射器的混合WOLED显色指数达到88，EQEmax达到30.6%，进一步证明了该方法的通用性和有效性。

这一破纪录的效率和超长的使用寿命强调了混合白光器件的成功，这种混合白光器件采用了机器人蓝色MR-TADF发射器。这些进步为混合WOLEDs的商业化开辟了新的途径，为节能照明和显示技术提供了有前途的解决方案。

附：英文原文

Title: High-power-efficiency and ultra-long-lifetime white OLEDs empowered by robust blue multi-resonance TADF emitters

Author: Chen, Guohao, Miao, Jingsheng, Huang, Xingyu, Zhang, Zhenghao, Xue, Zhuixing, Huang, Manli, Li, Nengquan, Cao, Xiaosong, Zou, Yang, Yang, Chuluo

Issue&Volume: 2025-02-11

Abstract: White organic light-emitting diodes (WOLEDs) show very promising as next-generation light-sources, but achieving high power efficiency (PE) and long operational lifetime remains challenging because of the lack of stable blue emitters that can harvest all triplet (T1) excitons for light emission. Herein, we propose integrating stable azure multi-resonance thermally activated delayed fluorescent (MR-TADF) emitters into tri-color hybrid WOLEDs to tackle these issues. By meticulously selecting MR-TADF emitters and precisely tuning the exciton recombination zone, the optimized tri-color devices based on BCzBN-3B achieve color-stable white light emission with maximum external quantum efficiency (EQEmax) and maximum PE (PEmax) of 34.4% and 101.8lmW1, respectively. Furthermore, the LT90, defined as the time for the luminance to drop to 90% of its initial value at 1000cdm2, reaches 761h. In addition, a hybrid WOLED with deep blue emitter developed using our strategy achieves a high color rendering index of 88 and an EQEmax of 30.6%, further demonstrating the versatility and effectiveness of our approach. The record-breaking efficiency and ultra-long lifetime underscore the success of hybrid white-light devices by incorporating robust blue MR-TADF emitters. These advancements open new avenues for commercialization of hybrid WOLEDs, presenting promising solutions for energy-efficient lighting and display technologies.

DOI: 10.1038/s41377-025-01750-z

Source: https://www.nature.com/articles/s41377-025-01750-z