Effect of structural modifications on the spectral and lasing characteristics of truxene-cored starbursts with/without diphenylamine end-cappers
Source abstract
Abstract
本文选取三并茚基多臂结构共轭大分子材料TrXD (二苯胺 (DPA)端基修饰)和TrX (DPA端基未修饰)为模型分子, 系统研究了 DPA修饰对三并茚基多臂结构共轭大分子激光增益材料光物理特性和 激光增益行为的影响. 在多臂结构分子中引入DPA基团可以有效抑制 聚集, 从而显著降低聚集诱导的发射猝灭, 进而提高发光效率. 同时, TrXD的辐射衰减速率kr高于TrX, 表明DPA修饰有利于增强辐射衰减 过程. 与TrX相比, TrXD具有较低的放大自发辐射阈值(2.1–4.3 μJ cm−2), 较高的净增益系数(80–101 cm−1), 较低的损耗系数 (2.6–4.4 cm−1). 其中, Tr3D具有优异的激光性能, 其激光阈值为 0.31 kW cm−2, 明显优于Tr3 (0.86 kW cm−2). 研究结果显示, DPA端基 修饰的多臂结构分子系统具有作为有机激光增益介质应用的更好潜 力, 这归因于其更高的辐射衰减速率kr, 从而表现出更优异的激光增益 特性.
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Research context
OpenAlex topics: Luminescence and Fluorescent Materials · Organic Light-Emitting Diodes Research · Photochemistry and Electron Transfer Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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