在有机单晶晶体中,压力诱导的光发光增强
Chunjiao Wang1,2, Tao Zhang1,2, Lan Zhang1,2
1Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|July 20, 2024
概括
2,6-二乙烯 (DPA) 的压缩有机单晶显示了两倍以上的增强光发光 (PL). 在DPA晶体中这种可逆应变诱导的PL增强为灵活的光电子学开辟了新的途径.
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:
- 有机单晶提供优越的稳定性和光学特性,由于有序的结构.
- 有机晶体的脆性限制了它们在灵活和可穿戴的光电子设备中的使用.
- 研究应变对有机晶体光发光效应的影响对于开发新材料至关重要.
研究的目的:
- 为了研究拉伸应变对2,6-二乙烯 (DPA) 单晶体光发光 (PL) 的影响.
- 了解压力诱导DPA中的PL变化的潜在机制.
- 探索DPA单晶在灵活的光电子应用中的潜力.
主要方法:
- 对DPA单晶进行了拉伸应变,并测量了它们的光发光.
- 进行了循环曲和恢复测试,以评估PL增强的可逆性和稳定性.
- 理论计算 (例如,密度函数理论) 用于分析应变下的结构和电子变化.
主要成果:
- 在约1.42%的应力下,DPA单晶的光发光度增强了两倍以上.
- 应变诱导的PL增强在100个曲和恢复周期中是可逆的和稳定的.
- 理论计算表明,应变减少了二面角,增加了分子结合和振荡器强度,同时抑制了振动和非辐射衰变.
结论:
- 2,6-二乙 (DPA) 单晶在拉伸应变下显示出显著且可逆的光发光增强.
- 观察到的增强归因于增加的分子结合和减少的非辐射衰变途径.
- 由于其应变响应的光学特性,DPA单晶显示出高性能灵活光电子设备的潜力.
更多相关视频
06:08Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
Published on: December 27, 2018
8.9K
08:51Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
Published on: October 24, 2017
9.5K
相关概念视频
01:26Variables Affecting Phosphorescence and Fluorescence
495
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...
495
01:23Photoluminescence: Fluorescence and Phosphorescence
1.8K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
1.8K
01:14Photoluminescence: Applications
386
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...
386