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 - Journal Article
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
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GJ20-05497Y
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760; AV ČR(CZ) SAV-21-09
Program: Bilaterální spolupráce
Institutional support: RVO:68378271
Keywords : ZnO nanorods * Mo5+ * shallow donors * plasma treatment * photo- radio- and cathodolumi-nescence * EPR
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.4, year: 2022
Method of publishing: 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.
Permanent Link: http://hdl.handle.net/11104/0330674