Multifunctional Emitters for Single-Component Electrophosphorescent Devices

近年来，有机发光二极管(OLED)领域的许多工作都是因为它们在显示技术中的应用潜力，例如取代液晶显示器(LCD)。有机发光二极管使用由共轭环和pi电子组成的分子将电能转化为可见光。这种有机物提供了比传统LED更明亮、更高效的显示器；它们更容易制造，而且它们的沉积基板可以是柔性塑料。该项目将研究的新材料包含一个有机框架，具有配位的金属原子，通过一种称为磷光的过程提供更高的效率。合成化学技术将使我们能够系统地改变材料的化学结构，结果是发射的光的颜色将以受控的方式改变。这项新技术的一个特别目标是开发单组分材料，这将极大地简化器件制造过程。这一策略将消除与多组分器件相关的常见问题，并将使平衡的电荷注入和传输得到更精细的调整。这一跨学科的项目将结合有机合成、光物理和光电研究、器件制造和器件特性的测量。我们计划生产新一代有机发光二极管材料，以了解其基本特性，并展示将适用于电子显示技术商业化的器件。

Much work in the field of organic light-emitting diodes (OLEDs) during recent years has been motivated by their potential for applications in display technology, for instance to replace liquid crystal displays (LCDs). OLEDs use molecules which are built up from conjugated rings and pi-electrons to convert electrical energy into visible light. The organics offer brighter and more efficient displays than conventional LEDs; they are easier to manufacture and the substrates for their deposition can be flexible plastic. The new materials to be studied in this project contain an organic framework with coordinated metal atoms to deliver better efficiencies by a process known as phosphorescence. Synthetic chemistry techniques will enable us systematically to modify the chemical structure of the materials with the result that the colour of the emitted light will change in a controlled way. A particular goal of this new technology which we will address is develop single-component materials which will greatly simplify device fabrication processes. This strategy will eliminate common problems associated with multi-component devices, and will enable balanced charge injection and transport to be more finely tuned.This interdisciplinary project will combine organic synthesis, photophysical and optoelectrical studies, device fabrication and measurements of the device properties. We plan to produce a new generation of materials for OLEDs, to understand their fundamental properties and to demonstrate devices which will be applicable to commercialisation in electronic display technologies.