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控制系统间交叉/反向系统间交叉 (ISC/RISC) 竞争,以实现高效的红色无金属光分子

Daokun Zhong¹, Ruiqin Zhu¹, Zhao Feng¹

¹Engineering Research Center of Energy Storage Materials and Devices, School of Chemistry, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China. xiaolongyang@xjtu.edu.cn.

Materials horizons

|November 17, 2025

概括

研究人员使用石化原子调整有机分子从光到室温光 (RTP). 这项工作强调了无金属的光材料,用于高效的有机发光二极管 (OLED).

科学领域:

材料科学材料科学材料科学
有机化学有机化学
光物理学的光学物理学

背景情况:

调整有机分子的光物理性质对于先进的光电子设备至关重要.
在无金属有机材料中实现高效的室温光 (RTP) 仍然是一个挑战.
控制系统间交叉/反向系统间交叉 (ISC/RISC) 是管理排放路径的关键.

研究的目的:

在D-A-D有机分子中系统调节从光到RTP的排放特性.
为了研究合并素原子 (O,S,Se) 对光物理行为的影响.
为有机发光二极管 (OLED) 开发高效的无金属红色发光光材料.

主要方法:

合成D-A-D分子 (PhODCB,PhSDCB,PhSeDCB) 具有不同的原子.
系统调节系统间交叉/反向系统间交叉 (ISC/RISC) 竞争.
光物理特征包括量子产量和寿命测量.
有机发光二极管 (OLED) 的制造和测试.

主要成果:

加入O,S和Se原子将发射从光转移到热激活延迟光 (TADF),然后转移到RTP.
增强的重原子效应和n → π*转换与更好的量子产量和辐射衰变相关.
PhSeDCB展示了前所未有的红色发射RTP,其高光发光量子收益率 (PLQY) 为0.48,寿命短 (14.7μs).
使用PhSeDCB制造的红色OLED实现了18.9%的高电解发光效率.

结论:

基替代有效控制D-A-D有机分子中的光物理路径.
无金属的PhSeDCB是一种有前途的红色发射RTP材料,用于高性能OLED.
这一战略为开发新型光有机材料提供了巨大的潜力.

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