Wrocław University of Science and Technology Physics Seminar – Monday 22nd of June 2026

We cordially invite you to Wrocław University of Science and Technology Physics Seminar on Monday 22nd of June 2026 at 11:15 in room 322, building A-1, where there will be delivered a lecture:

Studies on the influence of defects and lattice strain on the properties of planar and columnar
heterostructures based on ZnO and GaN wide-bandgap semiconductors


Dr inż. Eunika Zielony
 
Department of Experimental Physics, Wrocław University of Science and Technology

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This seminar will present a series of research studies conducted within my habilitation thesis, focused on planar and nanowire heterostructures based on wide-bandgap semiconductor materials, including GaN/Si and Zn(Cd,Mg)O/Si systems grown by molecular beam epitaxy. The first part of the talk will introduce the motivation behind these studies and discuss the key research challenges related to the development of nitride- and oxide-based heterostructures for optoelectronic applications.
The second part will be devoted to the presentation of the most important results obtained using complementary experimental techniques, including Raman spectroscopy, X-ray diffraction, photoluminescence, electrical characterization (current-voltage and capacitance-
voltage measurements), and deep-level transient spectroscopy. Special attention will be given to the analysis of micro-strain in semiconductor nanowires and to the identification of defects responsible for the optical and electrical behavior of investigated heterostructures.
Finally, the seminar will summarize my main scientific achievements and present future research directions, including studies of core-shell nanowire structures, surface engineering of GaN nanowires, and the development of ultrafast photodetectors based on Zn(Cd)O.