Dr. Karol Kozakiewicz

Karol studied chemistry at the University of Gdańsk, where he completed his Bachelor’s and Master’s degrees. His early research focused on flavonol derivatives as fluorescent probes for monitoring the enzymatic activity of β-glycosidases. During his Master’s studies, he completed a six-week internship at Durham University, where he gained his first experience in photophysics. In 2019, Karol began his doctoral research on perylene diimides and benzothiadiazole derivatives for photocatalytic hydrogen evolution. Alongside his main PhD project, he contributed to studies on TADF and the heavy-atom effect in the group of Prof. Illia Serdiuk, funded by an NCBiR LIDER grant. He defended his PhD in 2026. Outside the lab, Karol collects and propagates rare plants. He is also a cat lover and enjoys music and cinema.

Funding: National Science Centre SONATA BIS 2023/50/E/ST5/00263

https://orcid.org/0000-0002-9510-1669

Publications:

  1. Hoffman E., Kozakiewicz K., Rybczyńska M., Mońka M., Grzywacz D., Liberek B., Bojarski P., Serdiuk I.: Photochemical transformation of a perylene diimide derivative beneficial for the in situ formation of a molecular photocatalyst of the hydrogen evolution reaction, Journal of Materials Chemistry A: Materials for Energy and Sustainability, Royal Society of Chemistry, vol. 12, no. 9, 2024, pp. 5233–5243, DOI: 10.1039/D3TA05930H
  2. Mońka M., Gogoc S., Kozakiewicz K., Ievtukhov V., Grzywacz D., Ciupak O., Kubicki A., Bojarski P., Data P., Serdiuk I.: Application of the heavy-atom effect for (sub)microsecond thermally activated delayed fluorescence and an all-organic light-emitting device with low-efficiency roll-off, ACS Applied Materials & Interfaces, American Chemical Society, vol. 16, no. 12, 2024, pp. 15107–15120, DOI: 10.1021/acsami.3c19627
  3. Rybczyńska M., Hoffman E., Kozakiewicz K., Mońka M., Grzywacz D., Ciupak O., Liberek B., Bojarski P., Serdiuk I.: Charge separation control in organic photosensitizers for photocatalytic water splitting without sacrificial electron donors, Journal of Catalysis, Academic Press, vol. 435, 2024, article no. 115539, pp. 1–11, DOI: 10.1016/j.jcat.2024.115539
  4. Mońka M., Grzywacz D., Hoffman E., Ievtukhov V., Kozakiewicz K., Rogowski R., Kubicki A., Liberek B., Bojarski P., Serdiuk I.: Decisive role of heavy-atom orientation for efficient enhancement of spin–orbit coupling in organic thermally activated delayed fluorescence emitters, Journal of Materials Chemistry C, Royal Society of Chemistry, vol. 10, no. 32, 2022, pp. 11719–11729, DOI: 10.1039/D2TC01729F
  5. Mońka M., Serdiuk I., Kozakiewicz K., Hoffman-Rusin E., Szumilas J., Kubicki A., Park S. Y., Bojarski P.: Understanding the internal heavy-atom effect on thermally activated delayed fluorescence: application of Arrhenius and Marcus theories for spin–orbit coupling analysis, Journal of Materials Chemistry C, Royal Society of Chemistry, vol. 10, no. 20, 2022, pp. 7925–7934, DOI: 10.1039/D2TC00476C
  6. Serdiuk I., Mońka M., Kozakiewicz K., Liberek B., Bojarski P., Park S. Y.: Vibrationally assisted direct intersystem crossing between the same charge-transfer states for thermally activated delayed fluorescence: analysis by Marcus–Hush theory including reorganization energy, Journal of Physical Chemistry B, American Chemical Society, vol. 125, no. 10, 2021, pp. 2696–2706, DOI: 10.1021/acs.jpcb.0c10605
  7. Reszka M., Serdiuk I., Kozakiewicz K., Nowacki A., Myszka H., Bojarski P., Liberek B.: Influence of a 4′-substituent on the efficiency of flavonol-based fluorescent indicators of β-glycosidase activity, Organic & Biomolecular Chemistry, vol. 18, no. 38, 2020, pp. 7635–7648, DOI: 10.1039/D0OB01505A
  8. Serdiuk I., Ryoo C. H., Kozakiewicz K., Mońka M., Liberek B., Park S. Y.: Twisted acceptors in the design of deep-blue TADF emitters: crucial role of excited-state relaxation in the photophysics of methyl-substituted s-triphenyltriazine derivatives, Journal of Materials Chemistry C, Royal Society of Chemistry, vol. 8, no. 18, 2020, pp. 6052–6062, DOI: 10.1039/C9TC07102D