Performance improvement for organic light emitting diodes by changing the position of mixed-interlayer

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Main Group Chemistry Pub Date : 2022-01-20 DOI:10.3233/mgc-210173

P. Maurya, P. Mittal, B. Kumar

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引用次数: 3

Abstract

Organic Light-Emitting Diode (OLED) is presently the most sought-after display technology. It provides low-cost, flexible, rollable displays in addition to wide viewing angles and excellent colour qualities. Still, the organic displays have not reached at their best performance and there is a lot of scope for improvement in their performance. In addition to the injection layer, emission layer, transport layer, etc, researchers are looking forward to the charge carrier transport layer, spacer layer, mixed interlayer, etc. to further enhance the device performance. In this article, a depth analysis related to the impact of the position of the mixed interlayer is performed to analyze the impact on device performance. It is observed that on shifting mixed interlayer (MI) towards the cathode; luminescence and current density depict depreciation. However, on shifting MI towards anode there is a significant performance improvement. The complete analysis includes seven device structures, wherein the position of MI is varied. The best performing device depicts luminescence of 17139 cd/m2 and a current density of 84.6 mA/cm2, which is 40.05% higher for luminescence and 111.5% for current density than that of reference device. Additionally, the internal analysis of device structure is thoroughly evaluated using the cut line method to better understand the internal device physics in terms of the electric field, electron concentration, total current density, Langevin’s recombination rate, and Singlet exciton density.

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改变混合中间层位置对有机发光二极管性能的改善

有机发光二极管(OLED)是目前最受欢迎的显示技术。除了宽视角和出色的色彩质量外，它还提供低成本、灵活、可卷曲的显示屏。尽管如此，有机显示器还没有达到它们的最佳性能，它们的性能还有很大的改进空间。除了注入层、发射层、传输层等，研究人员还期待电荷载流子传输层、间隔层、混合中间层等进一步提升器件性能。本文将对混合中间层位置的影响进行深入分析，分析其对器件性能的影响。观察到混合中间层(MI)向阴极移动;发光和电流密度表示衰减。然而，将MI移向阳极有显著的性能改进。完整的分析包括7种装置结构，其中MI的位置是不同的。该器件的发光强度为17139 cd/m2，电流密度为84.6 mA/cm2，比参考器件的发光强度和电流密度分别提高了40.05%和111.5%。此外，采用切线法对器件结构的内部分析进行了全面评估，以便更好地了解器件内部的电场、电子浓度、总电流密度、朗之万复合率和单重态激子密度等物理特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Main Group Chemistry 化学-化学综合

CiteScore

2.00

自引率

26.70%

发文量

审稿时长

>12 weeks

期刊介绍： Main Group Chemistry is intended to be a primary resource for all chemistry, engineering, biological, and materials researchers in both academia and in industry with an interest in the elements from the groups 1, 2, 12–18, lanthanides and actinides. The journal is committed to maintaining a high standard for its publications. This will be ensured by a rigorous peer-review process with most articles being reviewed by at least one editorial board member. Additionally, all manuscripts will be proofread and corrected by a dedicated copy editor located at the University of Kentucky.