电致发光
材料科学
有机发光二极管
窄带
咔唑
光电子学
分子
共振(粒子物理)
平面的
荧光
纳米技术
光化学
化学
光学
有机化学
原子物理学
物理
计算机图形学(图像)
图层(电子)
计算机科学
作者
Tao Wang,Xiaojun Yin,Xiaosong Cao,Chuluo Yang
标识
DOI:10.1002/anie.202301988
摘要
Most multi-resonance (MR) induced thermally activated delayed fluorescence (TADF) emitters generally exhibit strong aggregation and relatively worse solubility due to their rigid and planar molecule structures, which is highly undesirable for solution-processible devices. Herein, a simple but feasible approach for solution-processible small-molecule MR-TADF emitters is developed by incorporating two MR-TADF units onto carbazole bridge bearing long alkyl chains. The obtained emitters demonstrate supreme film-forming capability and narrowband emissions with full-width at half-maximums (FWHMs) of 22 nm. The resulting solution-processed narrowband electroluminescent devices achieve maximum external quantum efficiency of 27.1 %, which represents the highest efficiency among the solution-processed OLEDs based on MR-TADF emitters. This simple approach reveals great potential of developing solution-processible emitters for rigid and planar molecular structures.
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