[4]-Cyclo-2,7-Carbazole 作为高效磷光 OLED 中的主体材料：Nanohoops 在有机电子学中的新视角,Advanced Optical Materials

当前位置： X-MOL 学术 › Adv. Opt. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

[4]-Cyclo-2,7-Carbazole 作为高效磷光 OLED 中的主体材料：Nanohoops 在有机电子学中的新视角
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2022-11-29 , DOI: 10.1002/adom.202202191
Clément Brouillac ₁ , Fabien Lucas ₂ , Denis Tondelier ₂ , Joëlle Rault‐Berthelot ₁ , Christophe Lebreton ₃ , Emmanuel Jacques ₃ , Cassandre Quinton ₁ , Cyril Poriel ₁

Affiliation

在过去的十年中，π-共轭纳米环由于其卓越的性能而得到了长足的发展。然而，迄今为止，它们在有机电子设备中的应用仍然非常少。在这项工作中，第一个包含纳米环（[4]-环-N-丁基-2,7-咔唑，[4]C-Bu -Cbz ) 的报道，揭示了纳米环在电子学中的潜力。因此，使用红色磷光体 Ir(MDQ) ₂ (acac)，基于[4]C-Bu-Cbz的 PhOLED 显示出 17.0% 的高外量子效率 (EQE)，以及 20.6 cd A 的电流效率 (CE) ⁻¹，功率效率 (PE) 为 25.8 lm W ⁻¹表明电荷注入、传输和重组特别有效。该性能明显高于其线性对应物N-丁基-2,7-四咔唑 ( [4]L-Bu-Cbz )，后者的 EQE 为 11.1%，CE 为 13.0 cd A ⁻¹和15.7 lm W 的 PE ^-1. 环状化合物和非环状化合物在器件性能方面的显着差异为构建高性能电子器件提供了新的基础。这项包括光学、电化学、形态学和电荷传输特性的研究表明，纳米环可以有效地用作电子产品中的有机半导体，并为其在高性能光电器件中的实际应用开辟了道路，现在是下一阶段他们的进化。

"点击查看英文标题和摘要"

[4]-Cyclo-2,7-Carbazole as Host Material in High-Efficiency Phosphorescent OLEDs: A New Perspective for Nanohoops in Organic Electronics

In the last ten years, the development of π-conjugated nanohoops has been considerable owing to their remarkable properties. However, to date, their incorporation in organic electronic devices remains very scarce. In this work, the first high-performance organic electronic device (i.e., phosphorescent organic light-emitting diode, PhOLED) incorporating a nanohoop ([4]-cyclo-N-butyl-2,7-carbazole, [4]C-Bu-Cbz) is reported, revealing the potential of nanohoops in electronics. Thus, using the red phosphor Ir(MDQ)₂(acac), the [4]C-Bu-Cbz-based PhOLED displays a high external quantum efficiency (EQE) of 17.0%, a current efficiency (CE) of 20.6 cd A⁻¹ and a power efficiency (PE) of 25.8 lm W⁻¹ demonstrating that the charge injection, transport, and recombination are particularly efficient. This performance is significantly higher than that of its linear counterpart, N-butyl-2,7-quartercarbazole ([4]L-Bu-Cbz), which presents an EQE of 11.1%, a CE of 13.0 cd A⁻¹ and a PE of 15.7 lm W⁻¹. The significant difference, in terms of device performance, between cyclic and acyclic compounds provides a new basis to construct high-performance electronic devices. This study, which includes optical, electrochemical, morphological, and charge transport properties, shows that nanohoops can be efficiently used as organic semiconductors in electronics and opens the way to their practical uses in high-performance optoelectronic devices, which is now the next stage of their evolution.

更新日期：2022-11-29

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南