Free-standing ZnO:Mo nanorods exposed to hydrogen or oxygen plasma: influence on the intrinsic and extrinsic defect states

0556461 - FZÚ 2023 RIV CH eng J - Článek v odborném periodiku
Buryi, Maksym - Remeš, Zdeněk - Babin, Vladimir - Chertopalov, Sergii - Děcká, Kateřina - Dominec, Filip - Mičová, J. - Neykova, Neda
Free-standing ZnO:Mo nanorods exposed to hydrogen or oxygen plasma: influence on the intrinsic and extrinsic defect states.
Materials. Roč. 15, č. 6 (2022), č. článku 2261. E-ISSN 1996-1944
Grant CEP: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GJ20-05497Y
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760; AV ČR(CZ) SAV-21-09
Program: Bilaterální spolupráce
Institucionální podpora: RVO:68378271
Klíčová slova: ZnO nanorods * Mo5+ * shallow donors * plasma treatment * photo- radio- and cathodolumi-nescence * EPR
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.4, rok: 2022
Způsob publikování: Open access

Two new types of defects were initiated by the plasma treatment. Their appearance was explained, and corresponding mechanisms were proposed. The changes in the luminescence and scintillation properties were characterised by photo- and radioluminescence, respectively. Charge trapping phenomena were studied by thermally stimulated luminescence. Cold plasma treatment influences the luminescence properties of ZnO:Mo structures. The contact with hydrogen leads to the about triple intensity increase of the ultraviolet exciton-related band peaking at ~3.24 eV, whereas the red band attributed to zinc vacancies (~1.97 eV) was suppressed compared to the as-grown samples. The exciton- as well as defects-related emission subsided after the treatment in oxygen plasma.
Trvalý link: http://hdl.handle.net/11104/0330674