Facile access to deep red/near-infrared emissive AIEgens for efficient non-doped OLEDs.
Facile access to deep red/near-infrared emissive AIEgens for efficient non-doped OLEDs.
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轻松获得深红/近红外发射 AIEgens，实现高效非掺杂 OLED
DOI：
10.1039/c8sc01377b
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发表时间：
2018-07-28
期刊：
影响因子：
8.4
通讯作者：
Tang BZ
中科院分区：
文献类型：
--
作者：
Lee WWH;Zhao Z;Cai Y;Xu Z;Yu Y;Xiong Y;Kwok RTK;Chen Y;Leung NLC;Ma D;Lam JWY;Qin A;Tang BZ
设计了一种用于非掺杂NIR OLED的具有缩短的共轭长度但具有长发射波长的有效DR/NIR固体发射器。尽管在生物成像和光电子学中有巨大的需求，但高发射的深红色/近红外（DR/NIR）有机发光体的构建仍然是一个很大的挑战，因为窄的能隙通常导致低的光致发光量子产率。由于聚集引起的猝灭（ACQ）效应，甚至更难以提供固态的DR/NIR发射器。在本工作中，我们发现四苯乙烯取代的芳胺直接连接到受电子的2，1，3-苯并噻二唑上，可以方便有效地产生具有明亮发射的DR/NIR AIE发光体。通过调节取代基的种类，可以将发射波长从红光区调谐到DR/NIR区。这些AIEgens的长发射波长和高的光致发光量子产率归因于有效的分子内电荷转移和抑制的分子内运动。此外，基于AIEgens之一的非掺杂OLED显示出在684 nm处的EL发射，具有5772 mW Sr-1 m-2的大辐射率和1.73%的令人印象深刻的外量子效率（EQE）。
Design of an efficient DR/NIR solid emitter with a shortened conjugation length but long emission wavelength for non-doped NIR OLEDs. Notwithstanding the huge demand in bio-imaging and optoelectronics, the construction of highly emissive deep red/near infrared (DR/NIR) organic luminogens is still a big challenge because a narrow energy gap generally leads to low photoluminescence quantum yield. It is even more difficult to afford DR/NIR emitters in the solid state due to the aggregation caused quenching (ACQ) effect. In this work, we found that the direct attachment of a tetraphenylethylene substituted arylamine to the electron accepting 2,1,3-benzothiadiazole produces DR/NIR AIE luminogens with bright emission facilely and efficiently. And the emission wavelengths could be tuned from the red to the DR/NIR region by regulating the variety of the substituents. The long emission wavelength and high photoluminescence quantum yield of these AIEgens are ascribed to the effective intramolecular charge transfer and the suppressed intramolecular motion. Furthermore, non-doped OLEDs based on one of the AIEgens showed an EL emission at 684 nm with a large radiance of 5772 mW Sr–1 m–2 and an impressive external quantum efficiency (EQE) of 1.73%.
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萘并噻二唑基%20近红外%20发射器%20with%20a%20光致发光%20Quantum%20产率%20of%2060%%20in%20Neat%20Film%20and%20外部%20Quantum%20效率%20of%20up%20to%203.9%%20in%
影响因子：
19
作者：
Liu, Tengxiao;Zhu, Liping;Yang, Chuluo
通讯作者：
Yang, Chuluo
影响因子：
8.6
作者：
Graham, Kenneth R.;Yang, Yixing;Reynolds, John R.
通讯作者：
Reynolds, John R.
高%20效率%20固态%20近红外%20发射%20材料%20Based%20on%20三苯胺%20和%20二苯基富马腈%20with%20an%20EQE%20of%202.58%%20in%20Nonded%20Organic%20Light-Emitting%20二极管
影响因子：
19
作者：
Han, Xiao;Bai, Qing;Yang, Bing
通讯作者：
Yang, Bing
影响因子：
15.1
作者：
Liu, Jie;Li, Kai;Liu, Bin
通讯作者：
Liu, Bin
DOI：
10.1002/advs.201600481
发表时间：
2017-06
期刊：
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子：
--
作者：
Lyu Y;Pu K
通讯作者：
Pu K