The design of highly emissive and stable emitters for organic light emitting diodes (OLEDs) is still a challenge, justifying the intense research activity of the scientific community in the field. Recently, a great deal of interest has been devoted to the elaboration of emitters exhibiting a thermally activated delayed fluorescence (TADF). By a specific molecular design consisting into a minimal overlap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), luminescent materials exhibiting small singlet–triplet (S1–T1) energy splitting could be obtained, enabling to thermally convert the electrons from the triplet to the singlet excited states. By harvesting both singlet and triplet excitons for light emission, OLEDs competing or even overcoming the performance of phosphorescence-based OLEDs could be fabricated.
Project funding:
Interngovernmental programme administrated by Research Council of Lithuania: Lithuania–Latvia–China (Taiwan)
Project results:
The ultimate goals of this project are to develop OLED devices with a power efficiency more than180 lm/W, a lifetime 60,000 hours and a spectrum resemblance index (SRI) more than 90.
Period of project implementation: 2019-01-02 - 2021-12-31
Project coordinator: Kaunas University of Technology
Project partners: National Tsing-Hua University, Institute of Solid State Physics University of Latvia
