Plasma hydrogenation of hydrothermally grown ZnO micropods

0542442 - FZÚ 2022 RIV CZ eng C - Conference Paper (international conference)
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]
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR GC19-02858J
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : ZnO * micropods * inductively coupled plasma * optical emission spectroscopy * photoluminescence spectroscopy * Raman spectroscopy * infrared absorption spectroscopy
OECD category: 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.
Permanent Link: http://hdl.handle.net/11104/0319854