实现高效的色-红色热激活延迟光材料,通过构建分子内非对应相互作用
Tianxiang Zhao1,2,3,4, Shanshan Jiang1,3, Yashu Wang1,3
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
ACS applied materials & interfaces
|June 14, 2023
概括
研究人员使用非共价相互作用开发了新的色和色红色热激活延迟光 (TADF) 材料. 这些高效的发射器显著提高了有机发光二极管 (OLED) 的性能.
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:
- 为有机发光二极管 (OLED) 开发高效的色和红色热激活延迟光 (TADF) 材料是具有挑战性的,因为无辐射衰变和效率权衡.
- 现有的TADF材料努力平衡辐射衰变和反向系统间交叉 (RISC) 以获得最佳性能.
研究的目的:
- 设计和合成新型,高效的色和色红色TADF分子.
- 研究分子间非共价相互作用对TADF材料特性的影响.
- 为了证明这些材料在高性能OLED设备中的应用.
主要方法:
- 包含分子间非共价相互作用的分子设计.
- 新型TADF发射器 (TPA-PT和DMAC-PT) 的合成和表征.
- 光物理测量包括光发光量子产量 (PLQY) 和辐射/非辐射速率.
- 使用开发的TADF材料制造和测试OLED设备.
主要成果:
- 两个高效的色和色红色TADF分子 (TPA-PT和DMAC-PT) 已成功设计和合成.
- 分子间非共价相互作用有效抑制非辐射放松,增强辐射过渡,同时促进RISC.
- 在TPA-PT中达到94%的高PLQY,在DMAC-PT中达到87%.
- 对于色到色红色的电光发光,OLED设备显示出高的外部量子效率,高达26.2%.
结论:
- 引入分子间非共价相互作用的策略对于设计高效的色至红色TADF材料非常有效.
- 这些新的TADF发射器具有出色的光物理性能和设备性能,为先进的全彩和白色OLED铺平了道路.
- 这种方法提供了一条可行的途径,以克服TADF材料开发中的现有局限性.
相关概念视频
Variables Affecting Phosphorescence and Fluorescence
547
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
547
Photoluminescence: Applications
440
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
440
Protein Dynamics in Living Cells
2.2K
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
2.2K
Super-resolution Fluorescence Microscopy
7.1K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
7.1K


