通过含硫的外围替代物增强印洛卡巴索尔多共振发射器中的旋转轨道合,以实现快速反向交叉系统间的交叉
Tianjiao Fan1, Qiwei Liu1, Hai Zhang1
1Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.
研究人员开发了一种新型含硫的印洛卡巴索尔 (ICz) 多共振 (MR) 发射器. 这一进步显著加速了有效的深蓝色有机发光二极管 (OLED) 的反向系统间交叉 (RISC).
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 光物理学的光学物理学
背景情况:
- 实现快速反向系统间交叉 (RISC) 对于高效的多共振 (MR) 发射器至关重要,特别是那些来自印洛卡巴尔 (ICz) 的发射器.
- 现有的基于ICz的发射器在实现高RISC率方面面临挑战,这限制了它们在光电子应用中的性能.
研究的目的:
- 设计和合成一种具有显著增强RISC率的新型ICz-MR发射器.
- 为了研究将重原子效应纳入用于改善光物理性能的影响.
- 评估新发射器在有机发光二极管 (OLED) 中的性能,重点关注效率和滚动性.
主要方法:
- 在ICz框架中引入含硫的替代品,以利用重原子效应.
- 光物理性质的表征,包括RISC速率,辐射频谱和光发光量子产量.
- 使用开发的ICz-MR发射器制造和测试OLED设备,以评估外部量子效率 (EQE) 和效率滚动.
主要成果:
- 实现了1.2 × 10^5 s^-1的创纪录RISC率,几乎比以前报告的值高出一个数量级.
- 发射器显示了狭窄的深蓝色辐射 (456 nm,FWHM 12 nm) 与92%的高光发光量子产量.
- OLED设备的最大EQE为31.1%,并且显著抑制了效率滚动,EQE在1000cd/m^2时为29.9%,在5000cd/m^2时为18.7%.
结论:
- 含硫的ICz-MR发射器成功地利用重原子效应来实现超快的RISC.
- 这一突破使OLED的高效和稳定的深蓝辐射成为可能,克服了以前的局限性.
- 开发的发射器代表了高性能深蓝色OLED技术的重大进步.
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