Identification number: 1.1.1.3/1/24/A/006
Type: European Regional Development Fund (ERDF)
Duration: 01.07.2025. - 30.06.2028.
Project Leader: Latvian Institute of Organic Synthesis
Responsible person from ISSP UL: Dr. phys. Aivars Vembris, Institute of Solid State Physics University of Latvia (ISSP UL)
Partners: Latvian Institute of Organic Synthesis, OLEC Ltd.
Total funding: 655 526.95 EUR
ERDF funding: 509 344.44 EUR
Project summary:
The aim of the project is to develop efficient light-emitting electrochemical cells (LECs) using a previously unstudied ionic organic phosphor/dopant binary emitter system in the light-emitting layer.
To achieve the goal, the following project activities are planned:
Design and synthesis of new MJLMs for the formation of ionic organic phosphor/dopant binary emitter systems;
Investigation of the photophysical, photoelectric and thermal properties of the developed MJLM systems, such as photoluminescence quantum yield, singlet and triplet energy, hole and electron transport energy levels, as well as charge transfer properties;
Design, optimization and fabrication of a prototype LEC device using an ionic organic phosphor/dopant binary emitter system in the light-emitting layer of LEC devices.
Planned project results:
An ionic organic phosphor/dopant binary emitter system based on small-molecule MJLM emitters;
patentable LEC prototype;
three open access publications in top-tier scientific journals and participation in six scientific conferences;
one international PCT patent application.
PROJECT PROGRESS
Time period: 01.07.2025. – 30.09.2025.
Cationic luminophores were synthesized and their alkyl chains were modified to ensure more uniform formation of thin layers for the emissive layers of light-emitting electrochemical cells.
The morphological properties of the obtained series of luminophores during the thin-layer formation process were studied using different concentration ranges and solvent systems.
Quantum chemical calculations were used to determine the effect of introduced substituents on the structural and electronic properties of the molecules. The luminescent properties of all synthesized compounds were determined in the solid state and in solution.