Efficient blue fluorescent electroluminescence based on a simple multifunctional tetraphenylethylene–triazole hybrid material with aggregation-induced emission characteristics
Efficient blue fluorescent electroluminescence based on a simple multifunctional tetraphenylethylene–triazole hybrid material with aggregation-induced emission characteristics
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基于具有聚集诱导发射特性的简单多功能四苯乙烯-三唑杂化材料的高效蓝色荧光电致发光
DOI：
10.1016/j.optmat.2021.111045
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发表时间：
2021-05
影响因子：
3.9
通讯作者：
Wenjun Yang
中科院分区：
文献类型：
--
作者：
Wei Cui;Runze Wang;Mizhen Sun;Huayi Zhou;Yuan Yu;Tengyue Li;Qikun Sun;Shanfeng Xue;Wenjun Yang
虽然基于聚集诱导发光（AIE）效应的有机电致发光（EL）领域已经取得了相当大的进展，但是具有AIE效应的高效和多功能蓝色荧光团仍然有限。本工作以四苯乙烯-三唑杂化物为基础，设计合成了一种结构简单的蓝色荧光分子3，4-二苯基-5-（4 ′-（1，2，2-三苯基乙烯基）-[1，1 ′-联苯]-4-基）-4H-1，2，4-三唑（TPETAZ），该分子具有明显的AIE性质。在有机电致发光器件（OLED）中，具有AIE活性的分子TPETAZ可以作为本征蓝光发射层和电子传输层。具有TmPyPB层的非掺杂器件I的最大外量子效率（EQE）为2.4%，最大亮度（L）为1020 cd m-2，最大EL发射峰为468 nm。尽管没有TmPyPB层的器件II表现出优异的性能，但观察到最大EQE为2.0%，表明与器件I相比仅降低了18%。然而，最大EL发射峰几乎保持不变（~470 nm）。此外，可以通过用TPETAZ作为蓝光发射材料掺杂主体来获得高效掺杂的器件III。获得了4.1%的最大EQE，其分别大于装置I和II的42%和52%，这可以归因于电子和空穴载流子的有效复合。这项工作为设计高效的多功能蓝色EL AIE活性荧光团提供了一个有价值的策略，具有重要的实际应用潜力。
Although considerable progress has been achieved in organic electroluminescence (EL) fields based on aggregation-induced emission (AIE) effect emitters, highly efficient and multifunctional blue fluorophores with the AIE effect are still limited. In this work, a simple blue fluorescent molecule 3,4-diphenyl-5-(4ʹ-(1,2,2-triphenylvinyl)-[1,1ʹ-biphenyl]-4-yl)-4H-1,2,4-triazole (TPETAZ) with the evident properties of AIE has been designed and synthesized based on tetraphenylethylene–triazole hybrid. The AIE-active molecule TPETAZ can act as both intrinsic blue light-emitting and electron-transporting layer in organic light-emitting diodes (OLEDs). Nondoped Device I with TmPyPB layer exhibits a maximal external quantum efficiency (EQE) of 2.4%, a maximum luminance (L) of 1020 cd m−2, and maximal EL emission peak of 468 nm. Even though Device II without a TmPyPB layer exhibited excellent performance, the maximal EQE was observed to be 2.0%, indicating a decrease of only 18% when compared with that of Device I. However, the maximal EL emission peak remains almost unchanged (~470 nm). Furthermore, efficient doped Device III can be obtained by doping the host with TPETAZ as the blue light-emitting material. A maximal EQE of 4.1% was obtained, which was greater than those of Devices I and II by 42% and 52%, respectively; this can be attributed to the effective recombination of electron and hole carriers. This work provides a valuable strategy for designing highly efficient multifunctional blue EL AIE-active fluorophores, which have significant potential for practical applications.
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影响因子：
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期刊：
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作者：
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影响因子：
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