Up-conversion luminescence photolithography in organic compounds using nanoparticles/photoresist composition (2020-2022)

Project coordinator: Dr. Phys. Jurģis Grūbe

Total cost: 270 762 EUR

Duration (years): 2020-2022

LZP FLPP Nr. lzp-2019/1-0422

Preparation of active microstructures from photoresist/chromophore systems would benefit in cost-efficient device fabrication. Unfortunately, most organic chromophores absorb almost all of the blue light used for photolithography at the surface of the thin film and there is no light interaction with photoresist within the whole thin film. This drawback could be overcome by adding photoactive nanoparticles in photoresist exhibiting upconversion luminescence. Such nanoparticles absorb infrared light and emit blue light within the film.

The main goal of this project is development of photoresist/nanoparticle system that would be a part of the active media in organic photonic devices. Such approach opens new perspectives in creating organic waveguides and solid state lasers.

In the first part of the project issues related to synthesis of photoactive nanoparticles and mixing them into photoresist will be addressed. In the second part of the project photoresist doped with nanoparticles will be combined with organic chromophores. Photolithography of this complex system will be studied. In the end of project, we will assemble knowledge how nanoparticles are dispersed into photoresist and the possibility of combining with organic chromophores. Results of the project will give advanced knowledge required for the further development of organic laser.