三线态聚变过程及其在有机发光二极管中的应用

三线态聚变（triplet fusion或者TTA）发光可满足高亮度下高效率的应用需求，是实现蓝光发射最理想的发光机制。本项目针对自旋特性-TTA物理过程-器件性能之间的内在关联，将结合分子设计、光物理和器件物理研究，采用发光磁场效应、时间分辨光谱、温度依赖性和电子自旋共振等原位测试技术，深入分析影响TTA材料和器件物理过程的自旋因素；合成一系列异质双核-TTA（hetero-TTA）蓝光材料，突破传统同质-TTA（homo-TTA）对TTA效率的约束，实现100%高能单线态激子产率。项目的目标是揭示TTA物理过程机制、开发高性能蓝光TTA材料、制备高效率蓝光器件。创新性体现在多种原位检测技术联用，从自旋守恒的角度去研究TTA，提出利用异质-TTA的发光机制突破发光效率。该项目的顺利进行对丰富有机光电子学理论具有非常重要的科学价值，并实现一系列高效率的蓝光TTA材料和器件。

Triple exciton fusion (TF or TTA) is the most ideal luminescence mechanism for blue light emission, since it can meet the need of practical application with high efficiencies under high brightness. Aiming at the intrinsic correlation among spin characteristics-TTA physical process-device performance, this project will combine molecular design, photophysics and device physics research, and use in-situ measurement techniques such as magnetic field effect, time-resolved spectroscopy, temperature dependence and electron spin resonance to analyze the impacts of spin factors on the physical process of TTA materials and devices, and synthesize a series of heterogeneous TTA (hetero-TTA). The goal is breaking the limitation stand in homo-TTA and approaches 100% high-energy singlet exciton yield from TTA process. The objective of the project is to reveal the physical process mechanism of TTA, develop high performance blue TTA materials and fabricate high efficiency blue light devices. Innovation is embodied in the combination of various in-situ detection techniques, TTA is studied from the perspective of spin conservation. It is proposed to break through the luminescence efficiency by using the hetero-TTA materials. The successful implementation of this project has very important scientific value in enriching the theory of organic optoelectronics and realizing a series of high efficiency blue TTA materials and devices.