具有d-f过渡的兰他尼德复合物:用于单层发光白色有机发光二极管的新发射器
Peiyu Fang1, Peihao Huo1, Liding Wang1
1Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, 100871, Beijing, China.
Light, science & applications
|July 7, 2023
概括
使用和欧复合体开发了高效的单层发射白色有机发光二极管 (WOLED). 这种方法简化了材料选和能量水平调整,用于先进的照明应用.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 摄影化学的使用.
背景情况:
- 单层发光白色有机发光二极管 (SEL-WOLED) 提供了简化的设备结构,但在材料选择和精确的能量水平控制方面面临着挑战.
- 开发高效和稳定的WOLED对于下一代照明技术至关重要.
研究的目的:
- 通过使用特定的 (III) 和欧 (II) 复合体来证明高效的SEL-WOLED.
- 克服材料选和SEL-WOLED中的能量水平调节的局限性.
- 探索d-f过渡发射器在WOLED应用中的潜力.
主要方法:
- 制造SEL-WOLED,其中包含一个天蓝色发射 (III) 复合体 (Ce-TBO) 和一个红色发射欧 (II) 复合体 (Eu).
- 设备性能的表征,包括外部量子效率 (EQE) 和国际照明委员会 (CIE) 坐标.
- 研究电光发光机制,重点关注电荷捕获和能量转移动态.
主要成果:
- 在各种发光度级别中实现了最大的外部量子效率15.9%,CIE坐标为 (0.33,0.39).
- 对于欧 (II) 复合体,证明了5%的可管理的重量兴奋剂度,归因于直接捕获孔和阻碍能量传输.
- 避免了传统SEL-WOLED中低能发射器通常所需的低度 (<1%).
结论:
- 使用d-f过渡发射器,特别是和欧复合体,可以规避在SEL-WOLED中对精细能量水平调节的需求.
- 观察到的电发光机制促进了高效的设备操作,在色-红色发射器的更高兴奋剂度下.
- 这些发现凸显了d-f过渡发射器在推进SEL-WOLED技术方面的发展潜力.
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