Effects of the relative position and number of donors and acceptors on the properties of TADF materials
Thermally activated delayed fluorescence (TADF) emitters have attracted great attention for the use in organic light-emitting diodes since they can potentially realize 100% internal quantum efficiency by utilizing both singlet and triplet excitons due to efficient reverse intersystem crossing process. However, rational molecular design strategy is still challenging for high-performance TADF emitters. It is critical to understand the key factors that affect the performance of TADF materials. In this regard, this review focuses on the recent progress made in the design and synthesis of TADF materials controlled by the position and numbers of donor and acceptor units in different molecular structures. The reasonable molecular design principles have been summarized with the photophysical and electroluminescence characteristics of TADF materials. Furthermore, the design guidelines and future prospects on high-performance TADF emitters are proposed for their future development.
- This article is part of the themed collection: Journal of Materials Chemistry C Recent Review Articles