0619261 - FZÚ 2026 RIV NL eng J - Článek v odborném periodiku
Lamonova, K. - Prokhorov, Andriy - Schmidbauer, M. - Kwasniewski, A. - Kazarinov, Y. - Konuhova, M. - Platonenko, A. - Remeš, Zdeněk - Ridzoňová, K. - Buryi, M.
Luminescence properties of ZnSe single crystals co-doped with Fe and Cr.
Optical Materials: X. Roč. 25, Feb (2025), č. článku 100393. ISSN 2590-1478
Grant CEP: GA ČR(CZ) GC24-10607J
Institucionální podpora: RVO:68378271
Klíčová slova: Co-doped * ZnSe single crystals * HR-XRD * EPR * luminescence spectra * DFT calculation * modified crystal field theory
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Způsob publikování: Open access
DOI: https://doi.org/10.1016/j.omx.2024.100393

The luminescence properties of two co-doped ZnSe:(Cr, Fe) single crystals, grown by the Bridgman method, have been studied using photoluminescence techniques. Structural characterization by high-resolution X-ray diffraction (HR-XRD), electron paramagnetic resonance (EPR) and scanning electron microscopy (SEM) has revealed that the samples differ in terms of dopant concentration and intrinsic native defects. Analysis of the VIS and near-IR photoluminescence spectra, based on the modified crystal field theory and DFT calculations has shown that Fe and Cr exist in two charge states (+2/+3) and can be located in both tetrahedral and octahedral positions. In the blue light region, quantum dots (QDs) appear. These represent clusters of three Cr-containing octahedral complexes accompanied by Zn vacancies, anticipating the formation of spinel ZnCr2Se4 inclusions in the host chalcogenide ZnSe matrix.
Trvalý link: https://hdl.handle.net/11104/0366002