Superior Hole Injection Material PEGDT/TPF/PVDF with p-Doping Capability for Highly Efficient Solution-Processed Organic Light-Emitting Diode

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2024-09-27 DOI:10.1021/acsami.4c11124

Hong Xu, Hao Yan, Junmin Chen, Xiaopeng Zhang, Pengli Zhang, Hongyang Li, Hong Meng

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Abstract

The ability to charge injection is a key factor in determining the performance of the organic light-emitting diode (OLED) devices. Improving the work function of the anode surface via interface modification, thus lowering the hole injection barrier, stands as a crucial strategy for enhancing the performance of the OLED device. Herein, we propose an innovative p-doping hole injection material, namely, PEGDT/TPF/PVDF that exhibits excellent performance in OLED devices with the value of maximum current efficiency at 56.4 Cd A^–1, maximum luminescence at 25,564 Cd m^–2, and a high EQE of 19.8%. The results for PEGDT/TPF/PVDF showed good conductivity, excellent film-forming property, and high transmittance over 98% in the spectrum range of 500–700 nm. Changes in the hole-injection energy barriers observed from the surface of the anode suggest a modified anode with PEGDT/TPF/PVDF deepened the work function at a value of 0.2 eV, which dramatically improves the hole-injection properties. This work not only provides novel structural materials with exceptional hole-injection properties but also proposes a promising alternative to PEDOT/PSS.

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具有 p 掺杂能力的优质注孔材料 PEGDT/TPF/PVDF 可用于高效溶液法有机发光二极管

电荷注入能力是决定有机发光二极管（OLED）器件性能的关键因素。通过界面改性提高阳极表面的功函数，从而降低空穴注入势垒，是提高有机发光二极管器件性能的关键策略。在此，我们提出了一种创新的 p 掺杂空穴注入材料，即 PEGDT/TPF/PVDF，它在 OLED 器件中表现出卓越的性能，最大电流效率值为 56.4 Cd A-1，最大发光值为 25,564 Cd m-2，EQE 高达 19.8%。PEGDT/TPF/PVDF 的结果显示出良好的导电性、优异的成膜性以及在 500-700 纳米光谱范围内超过 98% 的高透光率。从阳极表面观察到的空穴注入能垒的变化表明，PEGDT/TPF/PVDF 改性阳极加深了 0.2 eV 值的功函数，从而显著改善了空穴注入性能。这项工作不仅提供了具有优异空穴注入性能的新型结构材料，而且为 PEDOT/PSS 提供了一种前景广阔的替代品。

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.