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Supramolecular charge transfer emitters: increasing efficiency in the near-infrared

超分子电荷转移发射器：提高近红外效率

基本信息

批准号：
EP/W037661/1
负责人：
Timothy Barendt
金额：
$ 54.08万
依托单位：
University of Birmingham
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2023
资助国家：
英国
起止时间：
2023 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FW037661%2F1
关键词：
Supramolecular charge transfer emitters increasing

项目摘要

New organic materials are critical to the advancement of functional, sustainable, and biocompatible technologies, fit for the 21st century. An excellent example are the emissive materials that underpin organic light-emitting diodes (OLEDs), devices which are energy-efficient and essential components of thin, lightweight, and flexible modern-day displays. OLEDs that operate in the near-infrared region of the spectrum also have fantastic potential, including for new technologies in healthcare. For example, near-infrared OLEDs would be used for blood oximetry skin patches, to provide continuous and non-intrusive oxygen monitoring, key to nursing Covid-19 patients and an ageing UK population. However, OLEDs are currently unsuitable for this application because the efficiency of organic emissive materials in the near-infrared is low, which hampers device signal strength. To address this problem, the aim of this project is to develop state-of-the-art organic emissive materials that are efficient in the near-infrared region.The most promising OLED materials use electron-rich and electron-poor molecules, so-called donor-acceptor materials that exhibit thermally activated delayed emission. However, these materials currently have low efficiencies in the near-infrared, owing to a lack of structural control. This control is essential to optimising the electronic communication between donor and acceptor molecules. Here, supramolecular chemistry, the study of interactions between molecules, is ripe for exploitation.This research project will use supramolecular chemistry to optimise donor-acceptor electronic communication, developing novel molecular architectures to boost the efficiency of their near-infrared emission, for OLEDs. A comprehensive scientific understanding of this new supramolecular approach will be realised through specialist spectroscopic experiments to establish structure-property relationships. This work will arm chemists with a new blueprint of design for donor-acceptor materials, benefiting a broad range of research fields, including organic optoelectronics, catalysis and bioimaging. The new emitters will be used to prepare fluorescent materials, where again supramolecular chemistry will be key in translating efficiency from solution to thin films. In the longer-term, these materials will be applied in near-infrared OLED devices, including for wearable medical diagnostics, thereby furthering the project's socioeconomic impact.

新型有机材料对21世纪功能性、可持续性和生物相容性技术的发展至关重要。一个很好的例子是支撑有机发光二极管（oled）的发射材料，这种设备是节能的，是薄、轻、柔性现代显示器的重要组成部分。在近红外光谱区域工作的oled也具有巨大的潜力，包括医疗保健领域的新技术。例如，近红外oled将用于血液氧饱和度测量皮肤贴片，以提供连续和非侵入性的氧气监测，这是护理Covid-19患者和英国老龄化人口的关键。然而，oled目前不适合这种应用，因为有机发射材料在近红外波段的效率很低，这会影响器件的信号强度。为了解决这个问题，这个项目的目标是开发在近红外区域有效的最先进的有机发射材料。最有前途的OLED材料使用富电子和贫电子分子，即所谓的供体-受体材料，它们表现出热激活的延迟发射。然而，由于缺乏结构控制，这些材料目前在近红外波段的效率很低。这种控制对于优化供体和受体分子之间的电子通信是必不可少的。在这里，研究分子间相互作用的超分子化学已经成熟。该研究项目将使用超分子化学来优化供体-受体电子通信，开发新的分子结构来提高oled的近红外发射效率。对这种新的超分子方法的全面科学理解将通过专业的光谱实验来实现，以建立结构-性质关系。这项工作将为化学家们提供一个设计供体-受体材料的新蓝图，有利于广泛的研究领域，包括有机光电子学、催化和生物成像。新的发射器将用于制备荧光材料，超分子化学将是将效率从溶液转化为薄膜的关键。从长远来看，这些材料将应用于近红外OLED设备，包括可穿戴医疗诊断，从而进一步提高该项目的社会经济影响。