来自功能化冠状蛋白的室温多重光:温度传感和光有机发光二极管
Changfeng Si1, Tao Wang1, Abhishek Kumar Gupta1
1Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St. Andrews, KY16 9ST, UK.
Angewandte Chemie (International ed. in English)
|September 1, 2023
概括
新的冠烯材料使传感器和有机发光二极管 (OLED) 能够有效发光. 研究人员开发了多捐赠者-接受者分子,表现出可调节的光,用于先进的温度传感和高性能后照OLED.
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:
- 冠烯衍生物已知用于储能和太阳能电池,但由于激子利用率低,因此在发光传感器和OLED中作为发射器尚未得到充分探索.
- 开发高效的发射器对于推进有机发光二极管 (OLED) 和发光传感技术至关重要.
研究的目的:
- 为发光应用设计和合成基于冠烯的新型多捐赠者-接受器 (多D-A) 材料.
- 研究这些新材料的光物理性质,包括室温光 (RTP).
- 探索它们在高分辨率温度传感和溶液处理后照 OLED 的潜力.
主要方法:
- 合成多D-A冠烯衍生物:TCzPhCor,TDMACPhCor和TPXZPhCor,使用冠烯作为受体和炭醇,DMAC或PXZ作为捐赠体.
- 理论和光物理研究,包括对三重状态 (T1) 和它们的能量进行分析.
- 解决方案加工后发光OLED和温度传感应用的设备制造和表征.
主要成果:
- 在冠烯衍生物中实现了可调的光,TCzPhCor从最低的T1显示RTP,TDMACPhCor从高 (T1H) 和低 (T1L) 三重状态显示双重RTP,TPXZPhCor显示T1H主导的RTP.
- 通过使用TPXZPhCor.Cor.的温度灵敏度,证明了高颜色分辨率的温度传感.
- 使用TPXZPhCor制造了第一个基于corannulene的溶液加工后发光OLED,其最大外部量子效率 (EQEmax) 为3.3%,发光率 (Lmax) 为5167cd/m2,使其成为最有效的RTPOLED之一.
结论:
- 开发的多D-A冠烯图案提供了实现可调节光的多功能平台.
- TPXZPhCor显示出高性能温度传感和高效后照OLED应用的巨大潜力.
- 这项工作扩大了冠烯衍生物的应用范围,用于先进的发光技术.
相关概念视频
Photoluminescence: Applications
429
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...
429
Photoluminescence: Fluorescence and Phosphorescence
2.1K
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...
2.1K
Variables Affecting Phosphorescence and Fluorescence
527
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...
527
Fluorescence and Phosphorescence: Instrumentation
641
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
641
Photoelectric Effect
29.8K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
29.8K
Total Internal Reflection Fluorescence Microscopy
5.8K
Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
5.8K


