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High-Performance Doping-Free Hybrid White OLEDs Based on Blue Aggregation-Induced Emission Luminogens
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-09-22 00:00:00 , DOI: 10.1021/acsami.7b11422
Baiquan Liu 1 , Han Nie 1 , Gengwei Lin 1 , Shiben Hu 1 , Dongyu Gao 2 , Jianhua Zou 1 , Miao Xu 1 , Lei Wang 1 , Zujin Zhao 1 , Honglong Ning 1 , Junbiao Peng 1 , Yong Cao 1 , Ben Zhong Tang 1, 3
Affiliation  

Doping-free white organic light-emitting diodes (DF-WOLEDs) have aroused research interest because of their simple properties. However, to achieve doping-free hybrid WOLEDs (DFH-WOLEDs), avoiding aggregation-caused quenching is challenging. Herein, blue luminogens with aggregation-induced emission (AIE) characteristics, for the first time, have been demonstrated to develop DFH-WOLEDs. Unlike previous DFH-WOLEDs, both thin (<1 nm) and thick (>10 nm) AIE luminogen (AIEgen) can be used for devices, enhancing the flexibility. Two-color devices show (i) pure-white emission, (ii) high CRI (85), and (iii) high efficiency. Particularly, 19.0 lm W1– is the highest for pure-white DF-WOLEDs, while 35.0 lm W1– is the best for two-color hybrid WOLEDs with CRI ≥ 80. A three-color DFH-WOLED shows broad color-correlated temperature span (2301–11628 K), (i) the first sunlight-like OLED (2500–8000 K) operating at low voltages, (ii) the broadest span among sunlight-like OLED, and (iii) possesses comparable efficiency with the best doping counterpart. Another three-color DFH-WOLED exhibits CRI > 90 at ≥3000 cd m–2, (i) the first DF-WOLED with CRI ≥ 90 at high luminances, and (ii) the CRI (92.8) is not only the highest among AIE-based WOLEDs but also the highest among DF-WOLEDs. Such findings may unlock an alternative concept to develop DFH-WOLEDs.

中文翻译:

基于蓝色聚集诱导的发光原的高性能无掺杂杂化白色OLED。

无掺杂白色有机发光二极管(DF-WOLED)由于其简单的性能而引起了研究兴趣。但是,要实现无掺杂的混合WOLED(DFH-WOLED),避免聚集引起的猝灭是一项挑战。在本文中,首次证明具有聚集诱导发射(AIE)特性的蓝色发光剂可以开发DFH-WOLED。与以前的DFH-WOLED不同,薄(<1 nm)和厚(> 10 nm)的AIE发光剂(AIEgen)均可用于设备,从而增强了灵活性。两色设备显示(i)纯白色发射,(ii)高CRI(85)和(iii)高效率。特别是,纯白DF-WOLED的最高亮度为19.0 lm W 1–,而纯白的DF-WOLED最高为35.0 lm W 1–是CRI≥80的两色混合WOLED的最佳选择。三色DFH-WOLED显示出与颜色相关的宽温度范围(2301–11628 K),(i)第一款类似日光的OLED(2500–8000 K) (ii)在类似日光的OLED中运行范围最广,并且(iii)具有与最佳掺杂对应物相当的效率。另一种三色DFH-WOLED在≥3000cd m –2时显示CRI> 90 ;(i)第一个在高亮度下CRI≥90的DF-WOLED,以及(ii)CRI(92.8)不仅是最高的基于AIE的WOLED,但在DF-WOLED中也是最高的。这些发现可能会为开发DFH-WOLED开启一个替代概念。
更新日期:2017-09-23
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