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通过不对称的功能化二氨酸立方体克服集群发光二极管的效率限制

Nan Zhang¹, Huan Hu¹, Lei Qu¹

¹Key Laboratory of Functional Inorganic Materials Chemistry (Ministry of Education) & School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China.

Journal of the American Chemical Society

|March 31, 2022

概括

新的集束发光器件 (CLED) 显示性能有所改善. 单功能双酸铜集群表现出增强的光发光和电发光量子效率,为先进的照明技术铺平了道路.

科学领域:

材料科学
光电子产品
纳米技术

背景情况:

电发光 (EL) 纳米集群对于下一代集群发光器件 (CLED) 是有前途的.
由于集群发射器的缓慢辐射和灭,导致了CLED的性能限制.
开发高效的集群发射器对于发展照明技术至关重要.

研究的目的:

合成和表征新型单功能化双素化Cu4I4集群.
调查不对称修饰和电子捐赠阿克里丁基对集群光物理性能的影响.
通过提高发射器效率来提高CLED的性能.

主要方法:

合成两个单功能化双素合Cu4I4集群:[DMACDBFDP]2Cu4I4和[DPACDBFDP]2Cu4I4.
聚合物的兴奋状态属性的表征,重点是到配体的电荷转移.
对光发光和电发光量子效率的评估.

主要成果:

经过修改的集群呈现热激活的延迟光 (TADF).
观察到单个辐射速率常数的显著改善和三重非辐射速率常数的减少.
[DPACDBFDP]2Cu4I4实现了光发光量子效率的16倍 (81%) 和EL量子效率的20倍 (19.5%).

结论:

使用阿克里丁基的单功能化有效地增强了Cu4I4集群的辐射特性.
开发的集群显示了CLED的最新性能,超过了以前的基准.
这些发现为开发高效电光装置提供了新的途径.

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