基于两种不同手性基团的热激活延迟荧光材料，用于环形极化有机发光二极管。

IF 3.5 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemistry - An Asian Journal Pub Date : 2024-07-30 DOI:10.1002/asia.202400664

Jia-Qi Liang, Jia-Jun Hu, Zhong-Zhong Huo, Zhi-Ping Yan, Li Yuan, Xiao-Sheng Zhong, Yi Wei, Shi-Quan Song, Qi-Ming Liu, You Song, You-Xuan Zheng

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引用次数: 0

摘要

由于能够直接产生圆偏振发光（CPL），圆偏振有机发光二极管（CP-OLED）在三维显示领域的应用前景十分广阔。在这项研究中，通过将两个不同的手性基团整合到二氰基苯单元中，合成了两对圆偏振热激活延迟荧光（CP-TADF）对映体，分别命名为 RR/SS-ONCN 和 RS/SR-ONCN。RR/SS-ONCN 和 RS/SR-ONCN 对映异构体显示出 CPL 特性，在掺杂薄膜中的不对称光致发光因子（|gPL|）分别为 1.3 × 10-3 和 2.0 × 10-3。值得注意的是，RR/SS-ONCN 的|gPL|值高于 RS/SR-ONCN 的|gPL|值，尤其是在掺杂薄膜中，这表明当两个手性基团的构型相同时，CP-TADF 材料的|gPL|值可以得到增强，显示出一定的堆叠效应。此外，相应的 CP-OLED 表现出良好的性能，最大外部量子效率高达 21.9%，CP 电致发光效果显著，|gEL|系数高达 1.0 × 10-3。

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Two Different Chiral Groups Based Thermally Activated Delayed Fluorescence Materials for Circularly Polarized OLEDs.

Circularly polarized organic light-emitting diodes (CP-OLEDs) hold significant promise for applications in 3D displays due to the ability to generate circularly polarized luminescence (CPL) directly. In this study, two pairs of circularly polarized thermally activated delayed fluorescence (CP-TADF) enantiomers, named RR/SS-ONCN and RS/SR-ONCN, were synthesized by integrating two distinct chiral groups into the dicyanobenzene unit. The RR/SS-ONCN and RS/SR-ONCN enantiomers show CPL properties with dissymmetry photoluminescence factors (|g_PL|) of 1.3×10^-3 and 2.0×10^-3 in doped films, respectively. Notably, RR/SS-ONCN exhibit higher |g_PL| values than that of RS/SR-ONCN, especially in doped films, indicating that when the configurations of the two chiral groups are identical, the |g_PL| value of the CP-TADF materials can be enhanced, demonstrating a certain stacking effect. Moreover, the corresponding CP-OLEDs demonstrate good performances, achieving maximum external quantum efficiencies of up to 21.9 % and notable CP electroluminescence with |g_EL| factors of up to 1.0×10^-3.

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来源期刊

Chemistry - An Asian Journal 化学-化学综合

CiteScore

7.00

自引率

2.40%

发文量

535

审稿时长

1.3 months

期刊介绍： Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).