An efficient yellow thermally activated delayed fluorescence emitter with universal applications in both doped and non-doped organic light-emitting diodes
An efficient yellow thermally activated delayed fluorescence emitter with universal applications in both doped and non-doped organic light-emitting diodes
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一种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具有普遍应用
DOI：
10.1039/c8qm00064f
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发表时间：
2018-05-01
影响因子：
7
通讯作者：
Chi, Zhenguo
中科院分区：
文献类型：
--
作者：
Chen, Xiaojie;Yang, Zhan;Chi, Zhenguo
热激活延迟荧光（TADF）发光材料在有机电致发光器件（OLED）中的应用引起了人们的广泛关注。然而，提供具有高器件性能的掺杂和非掺杂OLED两者的TADF发射器是罕见的。在这项工作中，我们提出了一个黄色的TADF发射器（OPDPO）满足上述要求。基于OPDPO的掺杂OLED显示出26.7%的最大外部量子效率（EQE），这是掺杂黄色TADF基OLED的有史以来报道的最高EQE之一。在1000 cd m（-2）的亮度下，EQE仍高达22.1%。同时，基于OPDPO的非掺杂OLED在3600 cd m（-2）的高亮度下提供16.6%的最大EQE，这是基于非掺杂黄色TADF的OLED的最佳性能之一。此外，通过将蓝色常规荧光发射体与掺杂或非掺杂的OPDPO发射层结合，实现了简单高效的白色OLED，证实了OPDPO在高性能OLED中的普遍应用。
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.