The area of research Matic Pečovnik is focused on mostly focuses on the many aspects of the interaction between the plasma and the first wall in tokamak-type fusion reactors. To be more specific, the researcher focuses on determining the factors that influence the creation and evolution of lattice defects in tungsten and how the defects themselves influence hydrogen isotope retention. During his work, which mostly focuses on his PhD efforts, the researcher has made many connections to other scientific institutions. Most notably, the researcher conducts cutting edge experiments with fellow scientists from the Max-Planck Institut for Plasma Physics (IPP, Garching) that focus on the creation and evolution of tungsten lattice defects. Also noteworthy is his collaboration with French colleagues from the French agency for Alternative energy sources (CEA, Cadarache), which focuses on theoretical approaches to explain the retention of hydrogen isotopes in tungsten lattice damage.