In this project pyridine-containing analogues of tetraphenylethylene (TPE) are used for the synthesis of organic emitters exhibiting both aggregation induced emission enhancement (AIEE) and thermally activated delayed fluorescence (TADF). To scrutinize the libraries of AIEE active compounds, phenyl rings in TPE moiety are replaced with pyridine unit. Introduction of one or more pyridine rings in the TPE-like core is expected to induce TADF properties, to enhance photoluminescence quantum yields in the solid stated of the materials. Employment of electron withdrawing ability of pyridine moiety enables to reduce the energy gap between excited singlet and triplet states, which is crucial to realize the TADF properties. The umber of pyridine units and other heterocyclic units is gradually increased from one to four to find out the optimized molecular structure to have efficient TADF emitter with AIEE properties. The designed structures will be estimated by DFT calculations. The photophysical, thermal, electrochemical, charge-transporting properties of the synthesized compounds will be studied. The screened potential AIEE-active TADF emitters are used for the preparation emitting layers in OLEDs
Project funding:
Research Council of Lithuania (RCL), Projects of Postdoctoral fellowships funded by the state budget of the Republic of Lithuania
Project results:
The outcome of the project will include the rationally designed organic AIEE active TADF compounds which will be used as emitters in OLEDs. Lightning devices and displays can be accomplished in cost-effective and simplified processes by using rationally designed organic emitters exhibiting both AIEE and TADF. The results of the proposed research will be published in high-impact peer-reviewed journals. The applicant will be exposed to multidisciplinary research experience from the design and theoretical screening to the synthesis, investigation of the properties and to device engineering. The host group will benefitted from her experience in the organic synthesis and luminescent materials characterization.
Period of project implementation: 2023-02-01 - 2025-01-31
Project coordinator: Kaunas University of Technology
