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Development of Efficient OLEDs from Solution Deposition
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聚合物主机含有基于碳醇-二二二烯的悬挂,用于高性能解决方案加工的TADF-OLED中
Chae Yeong Park1, Su Hong Park1, Na Yeon Kwon1
1Department of Chemistry, Research Institute for Natural Sciences, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
ACS applied materials & interfaces
|August 19, 2024
概括
新的聚合物宿主提高有机发光二极管 (OLED) 的性能. 使用P2Cz-DBT的溶液处理器件实现了高效率,证明了热激活延迟光 (TADF) OLED的改善膜形成特性.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 聚合物化学 聚合物化学
背景情况:
- 有机发光二极管 (OLED) 的性能在很大程度上依赖于宿主材料的薄膜形成能力来处理溶液.
- 碳醇和二二二烯部分是主体材料中常见的构建块,用于有效发光.
研究的目的:
- 合成和评估用于溶液加工OLED的新型侧链聚合物宿主.
- 研究聚合物结构对热稳定性和薄膜形态学的影响.
- 评估使用这些聚合物宿主在热激活延迟光 (TADF) 应用中的设备的性能.
主要方法:
- 基基单体的激进聚合,以合成PCz-DBT和P2Cz-DBT聚合物宿主.
- 光物理性质和分子能量水平的表征.
- 使用合成聚合物主机制造和测试OLED设备,包括与发射器混合膜.
- 基于P2Cz-DBT的设备的性能评估,用于蓝绿色多重共振 (MR) TADF OLED.
主要成果:
- 合成的聚合物宿主 (PCz-DBT和P2Cz-DBT) 与小分子对应物 (Cz-DBT和2Cz-DBT) 具有类似的光物理和能量水平特征.
- 与小分子宿主相比,聚合物宿主表现出优越的热稳定性和增强的薄膜形成特性.
- 使用P2Cz-DBT进行溶液处理的TADF OLED在没有孔输送层的情况下实现了最大的17.4%的外部量子效率.
结论:
- 侧链聚合物主体在溶液处理OLED的热稳定性和薄膜形成方面具有优势.
- 该P2Cz-DBT聚合物主机使通过溶液加工制造的高性能蓝绿色TADF OLEDs成为可能.
- 这种聚合物主机设计策略对推进解决方案处理的OLED技术充满希望.
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