通过嵌入式阿泽类方法提高多重共振热激活延迟光发射器的上转换性能
Yi-Kuan Chen1, Jian Lei1,2, Tien-Lin Wu1,3
1Department of Chemistry, National Tsing Hua University No. 101, Sec. 2, Kuang-Fu Rd. Hsinchu 300044 Taiwan tlwu@mx.nthu.edu.tw.
Chemical science
|July 5, 2024
概括
研究人员开发了一种新型分子,TAzBN,用于高效的有机发光二极管 (OLED). 这种新材料即使在高度下也表现出高效率和稳定性,并显示出用于循环偏光应用的潜力.
科学领域:
- 有机电子学有机电子学
- 材料科学是一种材料科学.
- 光物理学的光学物理学
背景情况:
- 多重共振热激活延迟光 (MR-TADF) 发射器是高效有机发光二极管 (OLED) 和先进显示器的关键.
- 开发新的分子设计对于克服聚合引起的火和提高设备性能等局限性至关重要.
研究的目的:
- 为了在MR-TADF应用中引入一种新型的阿泽供体到-系统中.
- 为了研究新TAzBN分子的光物理性质和设备性能.
- 探索TAzBN在循环极化发光方面的潜力.
主要方法:
- 合成和表征TAzBN分子.
- 光发光量产量 (PLQY) 的测量.
- 不敏感的OLED设备的制造和测试.
- 循环极化光发光 (CPPL) 的测量.
主要成果:
- TAzBN表现出一个狭窄的单元-三元差距 (0.03 eV) 和一个高的反向系统间交叉 (RISC) 率 (8.50 × 10^5 s^-1).
- 在OLED中实现了令人印象深刻的94%的PLQY和27.3%的最大外部量子效率 (EQEmax).
- 在高度 (10%的重量) 证明了稳定的效率,表明抗聚合火.
- TAzBN 体表现出循环极化光发光与不对称系数的光发光. gPL 体高达 1.07 × 10^-3.
结论:
- 在TAzBN中的新型阿泽素供体有效地抑制聚合火并提高RISC率.
- TAzBN是一个有前途的高性能MR-TADF发射器,用于高效的OLED,具有出色的亮度稳定性.
- 该分子独特的几何形状为设计具有快速旋转翻转和手术性能的MR-TADF发射器提供了新的途径.
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