磷中心手性多共振热激活延迟荧光发射器实现窄带高效圆极化电致发光

IF 9.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY CCS Chemistry Pub Date : 2024-10-28 DOI:10.31635/ccschem.024.202404691
Xiang-Ji Liao, Shuai Xing, Jia-Jun Hu, Xiang-Zhi Wang, You-Xuan Zheng
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引用次数: 0

摘要

在有关具有中心手性的圆偏振多共振热激活延迟荧光(CP-MR-TADF)发射器的研究中,只应用了碳元素。在此,我们首次报道了一种具有磷中心手性的 CP-MR-TADF 材料,它含有叔丁基(苯基)氧化膦,即 (R/S)-4-POtBuCzB 对映体,在已报道的 CP-TADF 分子中具有最窄的半最大全宽(FWHM = 20 nm),具有对称 CP 光致发光,不对称因子(|gPL|)为 0.54 × 10-3。同时,2-POtBuCzB 进一步证明了膦参与了光物理性能调节。值得注意的是,使用 (R/S)-4-POtBuCzB 的 CP 有机发光二极管(CP-OLED)显示出显著的 CPEL 活性(|gEL|为 0.61 × 10-3),而使用 2-POtBuCzB 的 OLED 实现了 37.0% 的最大外部量子效率(EQEmax)。这些结果表明,在 MR-TADF 骨架中引入手性磷片段是 CP-MR-TADF 材料和器件的一种有效方法。
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Phosphorus Central Chiral Multiresonance Thermally Activated Delayed Fluorescence Emitter Towards Narrowband and Efficient Circularly Polarized Electroluminescence

For studies concerning circularly polarized multiple resonances thermally activated delayed fluorescence (CP-MR-TADF) emitters with central chirality, only carbon element has been applied. Herein, for the first time, we report a CP-MR-TADF material with phosphorus central chirality containing tert-butyl(phenyl)phosphine oxide, (R/S)-4-POtBuCzB, as enantiomers exhibiting the narrowest full-width at half-maximum (FWHM = 20 nm) among the reported CP-TADF molecules, with symmetric CP photoluminescence and a dissymmetry factor (|gPL|) of 0.54 × 10−3. Concurrently, 2-POtBuCzB further demonstrated that phosphine participated in photophysical performance regulation. Notably, CP organic light-emitting diodes (CP-OLEDs) using (R/S)-4-POtBuCzB showed remarkable CPEL activity with a |gEL| of 0.61 × 10−3, and OLED with 2-POtBuCzB, achieving a maximum external quantum efficiency (EQEmax) of 37.0%. These results demonstrate that introducing chiral phosphorus fragments into the MR-TADF skeleton is an efficacious approach for CP-MR-TADF materials and devices.

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来源期刊
CCS Chemistry
CCS Chemistry Chemistry-General Chemistry
CiteScore
13.60
自引率
13.40%
发文量
475
审稿时长
10 weeks
期刊介绍: CCS Chemistry, the flagship publication of the Chinese Chemical Society, stands as a leading international chemistry journal based in China. With a commitment to global outreach in both contributions and readership, the journal operates on a fully Open Access model, eliminating subscription fees for contributing authors. Issued monthly, all articles are published online promptly upon reaching final publishable form. Additionally, authors have the option to expedite the posting process through Immediate Online Accepted Article posting, making a PDF of their accepted article available online upon journal acceptance.
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