Plasma hydrogenation of hydrothermally grown ZnO micropods

0542442 - FZÚ 2022 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Remeš, Zdeněk - Aubrechtová Dragounová, Kateřina - Mičová, J.
Plasma hydrogenation of hydrothermally grown ZnO micropods.
Proceedings 12th International Conference on Nanomaterials - Research & Application - Nanocon 2020. Ostrava: Tanger Ltd., 2021, s. 512-517. ISBN 978-80-87294-98-7. ISSN 2694-930X.
[International Conference NANOCON 2020 /12./. Brno (CZ), 21.10.2020-23.10.2020]
Grant CEP: GA MŠMT(CZ) EF16_019/0000760; GA ČR GC19-02858J
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: ZnO * micropods * inductively coupled plasma * optical emission spectroscopy * photoluminescence spectroscopy * Raman spectroscopy * infrared absorption spectroscopy
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)

The hydrothermally grown ZnO micropods have been placed on grounded stainless-steel holder and exposed to an inductively coupled plasma (ICP) monitored in-situ by optical emission spectroscopy (OES). OES shows the immediate release of oxygen during Ar ion bombardment. The prolonged exposure to hydrogen plasma leads to deterioration of the optical properties as well. The exposure, rf power and hydrogen pressure have been optimized to enhance UV-photoluminescence peak at the wavelength 384 nm related to surface bounded excitons and reduce the defect-related photoluminescence in red spectral range. The strong UV photoluminescence appears just after 1 minute of plasma hydrogenation in a radio frequency plasma discharge with power density 40 W/dm3 and hydrogen pressure 17 Pa.
Trvalý link: http://hdl.handle.net/11104/0319854