本质上是可伸缩的光发光材料用于可伸缩显示器.
1Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Korea.
ACS applied materials & interfaces
|July 6, 2023
概括
研究人员为显示器开发了内在可拉伸的光发光层 (isp-EMLs). 这一突破提高了使用光材料的有机发光二极管 (OLED) 的伸展性和效率.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 显示技术 显示技术
背景情况:
- 本质上可拉伸的有机发光二极管 (is-OLED) 对于下一代显示器至关重要.
- 目前的可伸缩OLED主要使用光材料,其有限的内部量子效率 (IQE) 为25%.
- 光材料提供更高的理论IQE (100%),但尚未开发用于可拉伸的应用.
研究的目的:
- 设计和开发一种可处理溶液和内在可拉伸的光发光层 (isp-EML).
- 提高光OLED的机械和光电子性能,以提高性能和耐用性.
主要方法:
- 使用聚合物宿主 (聚9-乙烯基碳),PVK和光发射兴奋剂 (tris2-phenylpyridine) ,Irppy3) 创建了一个混合系统.
- 聚乙烯甘 (PEG-PPG-PEG) 被用作增材,以提高材料的性能.
- 在伸展性,亮度和效率方面评估了isp-EML的性能.
主要成果:
- 与传统的光EML相比,开发的isp-EML实现了显著改善的伸展性 (≤100%应变) (≤3%应变).
- 亮度增加到≤5400cd/m2,效率达到≤25.3cd/A,大大超过传统材料的性能.
- 可调节的发射颜色 (红色,绿色,蓝色) 是通过改变发射剂的方法实现的,保持了增强的机械和电气性能.
结论:
- 使用光材料和添加剂的新型混合系统显示出创造高度可拉伸和高效的OLED的巨大潜力.
- 这项工作克服了以前的局限性,使高效光OLED具有伸展性.
- 开发的 isp-EML 技术为先进,耐用和灵活的显示应用铺平了道路.
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