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聚合诱导的延迟光发射器在非兴奋剂OLED中的激发动态及其作为高效红色光OLED主机的应用
Hanlin Li1, Chengwei Lin1, Yibing Wu1
1Institute of Polymer Optoelectronic Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China. mszjzhao@scut.edu.cn.
聚合诱导的延迟光 (AIDF) 材料使高效的,无添加剂的OLEDs成为可能. 该研究揭示了它们的机制涉及反向系统间交叉,导致设备中的高性能和低效率滚动.
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:
- 聚合诱导延迟光 (AIDF) 材料在OLED中提供高光发光量子效率和激子利用.
- 了解AIDF发射器的电解发光机制对于设备优化至关重要.
- AIDF材料显示出非兴奋剂有机发光二极管 (OLED) 的潜力,效率降低.
研究的目的:
- 详细研究AIDF发射器CP-BP-PXZ的电发光机制.
- 阐明激电动力学在高效率和低滚动性非兴奋剂OLEDs中的作用.
- 评估CP-BP-PXZ作为光OLED主体材料的潜力.
主要方法:
- 使用电光发光 (EL) 测量对激子动态的研究.
- 详细分析高效率背后的机制,以及在非兴奋剂OLED中可以忽略的滚动.
- 使用CP-BP-PXZ作为主机的红色光OLED的制造和表征.
主要成果:
- 非兴奋剂OLED的高效率和微不足道的滚动归因于有效的反向跨系统交叉 (RISC) 从三重T2到单重S1状态在聚合状态.
- 由于其固有的AIDF特性,CP-BP-PXZ作为宿主表现出色.
- 使用CP-BP-PXZ作为主体制造的红色光OLED实现了23%的最大外部量子效率 (EQEmax),在1000cdm-2.2下保持21%.
结论:
- 该研究阐明了AIDF发射器的电发光机制,强调了RISC对高性能OLED的重要性.
- CP-BP-PXZ 是一种有前途的材料,既适用于非兴奋剂OLED中的排放层,也适用于光OLED中的宿主.
- 这些发现为开发具有卓越效率和稳定的先进OLED铺平了道路.
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