Solution-processed MnOx mediated hole injection and carbon dots fluorescence in high-performance light-emitting diodes

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-09-19 DOI:10.1016/j.optmat.2025.117539

Xiaocui Wang , Peibang Dai , Yi Wang , Jiaqing Liu , Yingling Xiao , Jia Yuan , Liming Liu , Honghang Wang , Xiaowen Zhang

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引用次数: 0

Abstract

Solution-processed MnO_x has been facilely synthesized from hydrothermal method. High-performance organic light-emitting diodes (OLEDs) are demonstrated with MnO_x mediated hole injection. Using single MnO_x as hole injection layer, the OLED shows radiance of 4.46 mW cm⁻² at 16 V and external quantum efficiency (EQE) of 2.42 %. With MnO_x-doped poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) tailoring hole injection, the OLED achieves satisfactory EQE of 3.83 % and maximum radiance of 12.77 mW cm⁻² at 14 V. High-performance photoluminescent LEDs from MnO_x mediated carbon dots (CDs) are realized. Using 395-nm (410-nm) chips excited composite MnO_x-CDs fluorescence, the photoluminescent LEDs achieve maximum luminance of 56945 cd m⁻² (85669 cd m⁻²) and power efficiency of 2.27 lm W⁻¹ (1.76 lm W⁻¹). Our works provide some novel insights into broadening MnO_x applications and advancing LEDs.

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溶液处理MnOx介导的孔注入和高性能发光二极管中的碳点荧光

水热法制备了溶液处理的MnOx。高性能有机发光二极管（oled）被证明与MnOx介导的孔注入。使用单一MnOx作为空穴注入层，OLED在16 V时的发光度为4.46 mW cm−2，外量子效率（EQE）为2.42%。通过mnox掺杂的聚（3,4-乙烯二氧噻吩）：聚苯乙烯磺酸裁剪孔注入，OLED在14 V下获得了令人满意的EQE为3.83%，最大辐照度为12.77 mW cm−2。利用MnOx介导的碳点（CDs）实现了高性能的光致发光led。采用395 nm （410 nm）芯片激发复合MnOx-CDs荧光，光致发光led的最大亮度为56945 cd m−2 (85669 cd m−2)，功率效率为2.27 lm W−1 （1.76 lm W−1）。我们的工作为扩大MnOx的应用和推进led提供了一些新的见解。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.