Design High-Performance Narrowband Emitters for Blue Light-Emitting Diodes Through Manipulating Resonance Structure of Aromatic Heterocycles

文献类别：Research Article | 发表期刊：Science China Chemistry

一、文献基本信息

作者团队： Yue Yu, Lei Xu, Wenle Tan, Yuyu Pan, Jiyin Xiao, Bohan Wang, Guangjun Tian, Yuguang Ma, Lei Ying* (通讯作者)

1. 华南理工大学（Guangzhou, 510640, China）
Institute of Polymer Optoelectronic Materials and Devices, Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices
对应作者：Yue Yu, Lei Xu, Wenle Tan, Bohan Wang, Yuguang Ma, Lei Ying

2. 沈阳工业大学（Liaoyang, 111003, China）
School of Petrochemical Engineering
对应作者：Yuyu Pan

3. 燕山大学（Qinhuangdao, 066004, China）
Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science
对应作者：Jiyin Xiao, Guangjun Tian

收稿时间：08 September 2024 | 录用时间：14 December 2024 | 发表时间：13 January 2025

期刊卷期：Science China Chemistry, Volume 68, pages 2652–2659 (2025)

DOI：10.1007/s11426-024-2478-x

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

Narrowband light-emitting materials play critical roles in improving the color gamut and energy consumption of electroluminescence. Herein we demonstrated that by regulating the ground state resonance structure form of emitters with polycyclic aromatic heterocycles, the high-energy vibration of the C–C bond can be effectively suppressed, resulting in narrow emission like classical cyanine dyes.

The designed compounds consist of twist and planar conformation, while having differences in the orientation of the positioning electron-donating (nitrogen) and electron-accepting (carbonyl) groups in the polycyclic aromatic hydrocarbon skeleton. The resulting compound Ac-Ph-Ac with a dominated zwitterionic resonance structure exhibits a relatively wide electroluminescent profile with the full width at half maximum (FWHM) of 42 nm and moderate device performance.

In contrast, the “soliton transition” of 2AcPh based on the cyanine limit character effectively suppresses C–C stretching vibration in the polycyclic aromatic heterocycle skeleton, leading to a narrow electroluminescent profile with FWHM of 30 nm (0.16 eV) associated with an impressively high external quantum efficiency of 28.52%, which is among the highest efficiencies of so far reported non-sensitized organic light-emitting diodes.

三、关键词

narrowband emission organic light-emitting diodes (OLEDs) aromatic heterocycles resonance structure cyanine limit

四、研究支持基金

五、支持信息

文件名称：11426_2024_2478_MOESM1_ESM.pdf

获取方式：通过期刊原文链接下载（无排版编辑，保持作者提交版本）

发布平台：chem.scichina.com 及 link.springer.com/journal/11426

内容说明：包含实验细节、补充数据及表征结果，为研究结论提供支撑

六、相关链接

原文链接（SpringerLink）：点击访问文献原文（Springer官网）

文献引用格式：Yu, Y., Xu, L., Tan, W. et al. Design high-performance narrowband emitters for blue light-emitting diodes through manipulating resonance structure of aromatic heterocycles. Sci. China Chem. 68, 2652–2659 (2025). https://doi.org/10.1007/s11426-024-2478-x

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