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相关实验视频

Updated: Feb 7, 2026

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
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基于供体平面化策略的高效纯红色多重共振发射器.

Linjie Li1, Yincai Xu1, Dongyue Zhang2

  • 1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University Changchun 130012 P. R. China chenglongli@jlu.edu.cn ycxu17@mails.jlu.edu.cn.

Chemical science
|February 6, 2026
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概括

为显示器开发高效的纯红色发射器是一项挑战. 本研究介绍了多重共振热激活延迟光 (MR-TADF) 材料的平面化策略,实现显著的红移和窄带宽,以提高OLED性能.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 有机电子 有机电子
  • 光物理学的光学物理学

背景情况:

  • 有效的纯红色多重共振热激活延迟光 (MR-TADF) 发射器用于真空热蒸发是稀缺的,限制了超高清显示颜色范围.
  • 目前使用单键捐赠器的MR-TADF设计具有扭曲灵活性,导致有限的红移,高分子重量和广泛的发射带宽.

研究的目的:

  • 开发一种新的捐赠者平面化策略,以创建高效,窄带纯红色MR-TADF发射器.
  • 为了增强π-结合和电荷转移效应的红移排放和改进分子平面性.

主要方法:

  • 在分子内融合了一个捐赠组与MR核心,以创建一个平面结构框架.
  • 合成和表征了概念验证发射器RBN-ICz.
  • 使用RBN-ICz发射器制造和评估了一种有机发光二极管 (OLED).

主要成果:

  • RBN-ICz发射器实现了96纳米的红移 (519至615纳米) 和减少的发射带宽 (0.15 eV).
  • 在报道的红色MR-TADF材料中,RBN-ICz显示了最小的分子量.
  • 基于RBN-ICz的OLED实现了CIE坐标 (0.67,0.33) 的34.1%的外部量子效率 (EQE),符合NTSC红色标准.

结论:

  • 通过分子内融合进行的捐赠体平面化是开发高效,窄带红色MR-TADF发射器的有效策略.
  • 这种方法克服了以前设计的局限性,允许显著的红移和狭窄的带宽.
  • 开发的RBN-ICz发射器对下一代需要广泛颜色范围的OLED显示器有很大的前景.