结合碳醇构建块和n-DABNA异原子对齐,为双嵌入式MR-TADF发射器提供性能提升
Feng Huang1, Xiao-Chun Fan1, Ying-Chun Cheng1
1Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 215123, Suzhou, Jiangsu, P. R. China.
Angewandte Chemie (International ed. in English)
|June 12, 2023
概括
一个新的天蓝色发射器, Π-CzBN, 结合了碳醇融合的构建块与 ν-DABNA 异原子对齐,用于高效的有机发光二极管 (OLED). 这种新型材料实现了接近100%的量子产量和卓越的设备性能,效率滚动最小.
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:
- 设计多重共振 (MR) 类型的热激活延迟光 (TADF) 发射器依赖于特定的构件和异质原子对齐.
- 碳素合的MR发射器 (CzBN衍生品) 和 ν-DABNA异质原子对齐是主要例子,展示了高性能.
研究的目的:
- 通过整合CzBN衍生物和n-DABNA异构原子对齐的优势,开发一种新的MR-TADF发射器.
- 为了研究新合成的发射器的光物理特性和OLED性能,命名为 Π-CzBN.
主要方法:
- 简单的一次性无玻利化被用于合成-CzBN.
- 描述了光物理特性,包括光发光量子收益率 (PLQY) 和单元-三元能量偏移 (ΔEST).
- 有机发光二极管 (OLED) 使用P-CzBN作为发射器来制造,以评估设备的性能.
主要成果:
- -CzBN 呈现出接近 100% 的 PLQY 和窄带天蓝色辐射 (16 nm/85 meV 的 FWHM).
- 发射器表现出高效的TADF特性,具有40 meV的小 ΔEST 和高反向系统间交叉率 (2.9 × 10^5 s^-1).
- 优化的OLED实现了高外部量子效率 (EQE) 的39.3%,最小的效率滚动 (20%在1000cd m^-2) 和 495nm的窄频发射.
结论:
- 新型的 Π-CzBN 发射器成功地集成了理想的构建块和异质原子对齐,以获得卓越的 MR-TADF 性能.
- Π-CzBN代表了MR-TADF材料的重大进步,为高性能,高效和稳定的OLED提供了一个有前途的候选者.
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