特拉波拉特内在轴性奇拉尔多共振热激活延迟光材料
Li Yuan1, Jun-Wei Xu1, Zhi-Ping Yan2
1State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China.
Angewandte Chemie (International ed. in English)
|May 23, 2024
概括
新的奇拉多共振热激活延迟光 (CP-MR-TADF) 材料为先进显示器提供超纯蓝色辐射. 这些新型化合物表现出高效率和循环偏光发射,为下一代CP-OLED铺平了道路.
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:
- 状多共振热激活延迟光 (CP-MR-TADF) 材料对于开发循环极化有机发光二极管 (CP-OLED) 和3D显示器至关重要.
- 开发高循环极化发光 (CPL) 的高效和稳定的CP-MR-TADF材料是一个持续的挑战.
研究的目的:
- 为了合成和描述基于比迪本佐[b,d]和比迪本佐[d,d]基的新型内在轴性CP-MR-TADF材料.
- 为了研究含硫对光物理性质和设备性能的影响.
- 评估这些材料在高性能CP-OLED应用中的潜力.
主要方法:
- 合成了两对四度处理的内在轴性CP-MR-TADF材料:R/S-BDBF-BOH和R/S-BDBT-BOH.
- 光物理性质的表征,包括发射光谱,光发光量子产量 (PLQYs) 和循环极化发光不对称因子.
- 制造和测试CP-OLED设备,以评估外部量子效率 (EQE) 和电解发光不对称因素 (RAS).
主要成果:
- R/S-BDBF-BOH和R/S-BDBT-BOH表现出超纯蓝色的辐射,辐射最大在458/459nm,半最大 (FWHM) 的狭窄全宽为27nm.
- 获得了90%/91%的高光发光量子产量和6.8×10-4/8.5×10-4的显著不对称系数 (RawgPL).
- 制造的CP-OLED显示出了出色的性能,其外部量子效率为30.1%,电解发光不对称系数为1.2×10−3.
结论:
- 开发的四度处理的内在轴性CP-MR-TADF材料显示出对CP-OLEDs高效和纯蓝色辐射的巨大希望.
- 加入硫原子有效地提高了反向系统间交叉速率,从而提高了设备的效率.
- 这些材料代表了循环极化有机电子领域的重大进步.
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