揭示了粉末形式的吖啶酮-胺衍生物和具有12% EQE的高效oled

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-05-01 DOI:10.1016/j.jphotochem.2025.116468

Komal Vasant Barhate , Mohammad Amir Ahemad , Juhi Dutta , Sangita Bose , Neeraj Agarwal

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引用次数: 0

摘要

基于荧光的有机发光二极管（oled）具有明显的吸引力，因为它们的使用寿命更长，电致发光的颜色纯度高，并且在下一代全彩显示和照明应用中具有无与伦比的低成本制造潜力。在这里，我们设计了n取代吖啶酮-二苯并氮卓衍生物（Aze-Me-Acr和Aze-Anisyl-Acr）。富含扭曲电子的二苯二氮卓在给受体键上提供有限的旋转。在室温（RT）下，Aze-Me-Acr和Aze-Anisyl-Acr均显示490至525 nm范围内的溶剂极性依赖荧光，而在77 K时，观察到约620 nm的三重态发射，寿命为435-547 ms。这两种发射体均表现出粉末形式的荧光和磷光双重发射。在550 &下观察到荧光；544 nm， 670 &处可见磷光；Aze-Me-Acr和Aze-Anisyl-Acr分别为655 nm。在红色区域（>600 nm）发现了8 ~ 15 μs的长激发寿命。并制备了以Aze-Me-Acr和Aze-Anisyl-Acr为主源的oled，其电致发光分别为绿色（CIE: 0.28, 0.65）和黄绿色（CIE: 0.39, 0.56）。在CBP共混物中掺杂Aze-Me-Acr器件获得了12.8%的高外量子效率（EQE）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Unveiling dual emission in powder form of acridone-amine derivatives and efficient OLEDs with 12% EQE

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Unveiling dual emission in powder form of acridone-amine derivatives and efficient OLEDs with 12% EQE

Fluorescence-based organic light-emitting diodes (OLEDs) are explicitly appealing due to their extended operational lifetimes, high color purity of electroluminescence, and unmatched potential for low-cost manufacturing in next-generation full-colour display and lighting applications. Here, we designed N-substituted acridone-dibenzoazepine derivatives (Aze-Me-Acr and Aze-Anisyl-Acr). Twisted electron rich dibenzoazepine provides limited rotation at donor–acceptor bond. Both, Aze-Me-Acr and Aze-Anisyl-Acr show solvent polarity dependent fluorescence in a range of 490 to 525 nm at room temperature (RT), whereas at 77 K, triplet emission at around 620 nm was observed having life time of ∼435–547 ms. Both these emitters showed dual emission i.e., fluorescence and phosphorescence in powder form. Fluorescence was observed at 550 & 544 nm while phosphorescence was seen at 670 & 655 nm, respectively for Aze-Me-Acr and Aze-Anisyl-Acr. Long excited lifetimes in the range of 8 to 15 μs were found in red region (>600 nm). OLEDs with Aze-Me-Acr and Aze-Anisyl-Acr as active emitters were also fabricated which showed green (CIE: 0.28, 0.65) and yellowish green (CIE: 0.39, 0.56) electroluminescence, respectively. Doped devices of Aze-Me-Acr in CBP blend resulted in high external quantum efficiency (EQE) of 12.8 %.

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.