Positive impact of chromophore flexibility on the efficiency of red thermally activated delayed fluorescence materials
Yuanyuan Wang, Kai‐Ning Tong, Kai Zhang, Chen‐Han Lu, Xing Chen, Jing-Xing Liang, Chuan‐Kui Wang, Chung‐Chih Wu, Man‐Keung Fung, Jian Fan
Abstract
transition, which resulted in a high fluorescence radiative decay rate. As a result, the optimized devices based on PT-TPA gave a maximum external quantum efficiency (EQE) of 29.7% (632 nm) when doped in a single host and an EQE of 28.8% (648 nm) in an exciplex host. This study provided an insight into the impact of chromophore flexibility on the photophysical properties and device efficiency of TADF materials, and these results may provide valuable guidance for the molecular design of efficient emitters.
Topics & Concepts
ChromophoreFlexibility (engineering)FluorescenceMaterials sciencePhotochemistryChemistryOpticsPhysicsStatisticsMathematicsOrganic Light-Emitting Diodes ResearchThin-Film Transistor TechnologiesLuminescence and Fluorescent Materials