High-Efficiency Deep Blue OLEDs With Hot Exciton Materials as Emitters and Hosts

文献类别：Research Article | 发表期刊：Advanced Optical Materials

一、文献基本信息

作者团队： Lveting Zhang, Dehua Hu* (通讯作者), Shipan Wang, Yuyu Pan, Wenle Tan, Yue Yu, Mingke Li, Lei Ying* (通讯作者), Yuguang Ma

1. 华南理工大学（Guangzhou, 510640, P. R. China）
Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices
对应作者：Lveting Zhang, Wenle Tan, Yue Yu, Mingke Li, Lei Ying, Yuguang Ma

2. 广东工业大学（Guangzhou, 510006, P. R. China）
School of Chemical Engineering and Light Industry
对应作者：Dehua Hu（通讯作者）

3. 广东巨化印刷显示科技有限公司（Guangzhou, 510700, P. R. China）
Guangdong Juhua Printed Display Technology Co., Ltd
对应作者：Shipan Wang

4. 沈阳工业大学（Shenyang, 110801, P. R. China）
Shenyang University of Technology
对应作者：Yuyu Pan

通讯作者邮箱： （Dehua Hu）； （Lei Ying）

发表时间：First published: 02 May 2025 | Published in issue: 17 June 2025

期刊卷期：Advanced Optical Materials, Volume 13, Issue 17, Article ID: 2500228 (2025)

DOI：10.1002/adom.202500228

伦理声明：作者声明无利益冲突（Conflict of Interest: The authors declare no conflict of interest.）

二、研究摘要

Achieving highly efficient deep-blue emissive materials with Commission Internationale de l'Eclairage (CIE) coordinates approaching BT.2020 standard remains a significant challenge in organic light-emitting diodes (OLEDs). Here, three novel deep blue emitters (namely PAF, PAFN, and PAPF) are developed through twisting substitution of anthracene with phenanthridazole unit and dibenzofuran derivatives.

All three materials demonstrate efficient hot exciton characteristics, featured by efficient reverse intersystem crossing from high-lying triplet states to singlet states, which is conducive to harvesting the triplet excitons in OLED applications. Detailed photophysical analyses indicate that the lowest singlet state of these materials is a localized excited state, ensuring highly efficient deep-blue emission.

The non-doped OLED based on PAPF exhibited deep-blue emission with a maximum external quantum efficiency (EQEmax) of 8.6% and CIE coordinates of (0.150, 0.057). The binary doped OLED with PAPF as host and organoboron-based fluorophore as guest achieved an EQEmax of 10%, with a narrow full width at half maximum of 18 nm. It is also worth noting that an exceptional efficiency and minimal roll-off (EQE = 9.0% at 1000 cd m−2) is realized in the current binary host-guest system.

This study provides valuable insights into developing efficient wide-bandgap emitters for stable, high-performance OLEDs.

三、关键词

deep-blue electroluminescent materials hot exciton hRISC low efficiency roll-off OLEDs

四、研究支持基金

五、支持信息

文件名称：adom202500228-sup-0001-SuppMat.docx

文件大小：4.2 MB

获取方式：通过期刊原文链接下载（含实验细节、补充表征数据及器件性能测试结果）

内容说明：包含材料合成路线、光物理性质测试方法、OLED器件制备流程及补充图表，为研究结论提供完整实验支撑

六、相关链接

原文链接（Wiley Online Library）：点击访问文献原文（Advanced Optical Materials官网）

文献引用格式：Zhang, L., Hu, D.*, Wang, S., Pan, Y., Tan, W., Yu, Y., Li, M., Ying, L.*, Ma, Y. (2025). High-Efficiency Deep Blue OLEDs With Hot Exciton Materials as Emitters and Hosts. Adv. Opt. Mater., 13(17), e2500228. https://doi.org/10.1002/adom.202500228

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