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基于三基的双热激活延迟光发射器,用于单分子白色发光二极管

Meiyan Liu¹, Hongbo Li², Hongwei Ma³

¹Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, P. R. China.

ACS applied materials & interfaces

|March 26, 2025

概括

为稳定的白色有机发光二极管 (WOLED) 开发了新的有机双热激活延迟光 (TADF) 发射器. 这些机色材料可以实现可切换的发射和纯白光,从而推进了OLED技术.

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:

具有双热激活延迟光 (TADF) 的单分子发射器对于先进的有机发光二极管 (OLED) 来说至关重要.
机色双TADF材料的开发仍然是该领域的一个重大挑战.

研究的目的:

合成和描述具有双TADF特性的新型捐赠者-接受者发射器.
为了研究这些新材料的机械色态行为和固态发射特性.
根据开发的发射器,制造和评估单分子白色有机发光二极管 (SM-WOLED).

主要方法:

具有双TADF特征的捐赠体-接受体发射体 (Mes*BA-Ac和XylBA-Ac) 的合成.
研究固态光物理,包括HOMO-LUMO分离和分子间相互作用.
用于性能评估的混合薄膜和单分子设备 (SM-WOLED) 的制造.
分析机色特性和在相位转换时的排放切换.

主要成果:

Mes*BA-Ac和XylBA-Ac在固态中表现出双TADF,这归因于电子结构和分子间力量.
从无形状态到晶体状态的相位过渡导致可切换的TADF排放.
混合的Mes*BA-Ac实现了纯白光的发射 (CIE:0.33,0.32).
制造的SM-WOLED显示出最大的外部量子效率 (EQEmax) 为1.65% (CIE:0.30,0.31).

结论:

开发的双TADF发射器为创建高效和稳定的纯有机SM-WOLED提供了一个有希望的途径.
机色特性使可调节的发射成为可能,这对于先进的显示技术至关重要.
双TADF机制有助于在广泛的电压范围内稳定地发射白光.

关键词:

捐赠者-接受者结构双热激活延迟光双热激活延迟光这是一种机械色彩主义.单个分子白色发光二极管三基 (Triarylboron) 是一种三基.

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