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An efficient yellow thermally activated delayed fluorescence emitter with universal applications in both doped and non-doped organic light-emitting diodes†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2018-03-13 00:00:00 , DOI: 10.1039/c8qm00064f
Xiaojie Chen 1, 2, 3, 4, 5 , Zhan Yang 1, 2, 3, 4, 5 , Zongliang Xie 1, 2, 3, 4, 5 , Juan Zhao 1, 2, 3, 4, 5 , Zhiyong Yang 1, 2, 3, 4, 5 , Yi Zhang 1, 2, 3, 4, 5 , Matthew. P. Aldred 1, 2, 3, 4, 5 , Zhenguo Chi 1, 2, 3, 4, 5
Affiliation  

Thermally activated delayed fluorescence (TADF) emitters have aroused serious attention for their use in organic light-emitting diodes (OLEDs). However, TADF emitters providing both doped and non-doped OLEDs with high device performance are rare. In this work, we present a yellow TADF emitter (OPDPO) meeting the above requirements. The OPDPO-based doped OLEDs show a maximum external quantum efficiency (EQE) of 26.7%, which is amongst the highest ever reported for doped yellow TADF-based OLEDs. The EQE remains as high as 22.1% at a luminance of 1000 cd m−2. Meanwhile, the OPDPO-based non-doped OLEDs afford a maximum EQE of 16.6% at a high luminance of 3600 cd m−2, which is amongst the best performances of non-doped yellow TADF-based OLEDs. Moreover, simple and efficient white OLEDs are implemented by combining a blue conventional fluorescent emitter with either a doped or non-doped OPDPO emissive layer, confirming the universal applications of OPDPO in high-performance OLEDs.

中文翻译:

高效的黄色热激活延迟荧光发射器,在掺杂和非掺杂有机发光二极管中都有通用应用

热活化延迟荧光(TADF)发射器因其在有机发光二极管(OLED)中的使用而引起了人们的严重关注。然而,提供具有高器件性能的掺杂和非掺杂的OLED的TADF发射极是罕见的。在这项工作中,我们提供了满足上述要求的黄色TADF发射器(OPDPO)。基于OPDPO的掺杂OLED的最大外部量子效率(EQE)为26.7%,这是有报道的基于掺杂黄色TADF的OLED的最高量子效率之一。在1000 cd m -2的亮度下,EQE保持高达22.1%。同时,基于OPDPO的非掺杂OLED在3600 cd m -2的高亮度下可提供16.6%的最大EQE。,这是非掺杂的基于黄色TADF的黄色OLED的最佳性能之一。此外,通过将蓝色常规荧光发射器与掺杂或未掺杂的OPDPO发光层结合在一起,可以实现简单有效的白色OLED,从而确认了OPDPO在高性能OLED中的普遍应用。
更新日期:2018-03-13
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