The long-term goal of this project is to validate the design principle for future night vision systems, based on a new electromagnetic wave conversion method from infrared radiation to higher energy visible spectrum radiation, using relatively inexpensive organic materials exhibiting thermally activated delayed fluorescence (TADF) effect, which are also known as emitters used in organic light-emitting diodes (OLEDs). The project’s objectives will be pursued by Ukrainian scientists utilizing TADF materials synthesized by a Lithuanian partner, with a controlled energy difference between the singlet and triplet excited electronic states. The project will focus on investigating the photophysical properties of these materials, demonstrating the conversion of invisible near and mid-infrared radiation to visible, i.e., higher energy TADF emission, enhancing this emission by using infrared radiation-emitting materials and carbon nanoparticles. Additionally, the effect of infrared radiation on the intensity and spectral shape of TADF emission will be explored.
Project funding:
Intergovernmental programme administrated by Research Council of Lithuania: Lithuania–Ukraine
Project results:
The aim of the project is the synthesis, characterization, and structural modification of new organic materials and composite materials. The Lithuanian partners will carry out the synthesis and preliminary characterization of the obtained materials. During the project, we will synthesize branched molecular structures containing donor fragments of 3(2)-aryl-substituted carbazole and acceptor fragments of diphenyl sulfone as TADF derivatives, bipolar TADF materials with a pyrimidine fragment, derivatives containing benzophenone (electron-transporting) and bicarbazole (hole-transporting) fragments. The Ukrainian partners will prepare composite materials by combining TADF and IR emitters with carbon nanoparticles and will perform detailed spectroscopic studies of the obtained materials. Conclusions will be drawn regarding the further improvement of the molecular structure of TADF materials. It is expected that the results obtained during the project will be published in highly cited scientific journals relevant to chemistry and materials science. Additionally, the results will be presented at national and international conferences related to molecular chemistry, photochemistry, and optoelectronics, ensuring wide dissemination of the scientific results.
Period of project implementation: 2024-01-23 - 2025-12-31
Project coordinator: Kaunas University of Technology
