Room temperature plasma hydrogenation – an effective way to suppress defects in ZnO nanorods

0539107 - FZÚ 2021 RIV NL eng J - Journal Article
Remeš, Zdeněk - Buryi, Maksym - Neykova, Neda - Stuchlík, Jiří - Mičová, J. - Hsu, H.S.
Room temperature plasma hydrogenation – an effective way to suppress defects in ZnO nanorods.
Materials Today: Proceedings. Roč. 33, č. 6 (2020), s. 2481-2483. E-ISSN 2214-7853
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 nanorods * EPR * photoluminescence * F⁺ center * exciton emission * plasma hydrogenation
OECD category: Nano-materials (production and properties)
Method of publishing: Limited access
https://doi.org/10.1016/j.matpr.2020.02.758

The densely packed, perpendicularly oriented ZnO nanorods were hydrothermally grown in dark and under UV irradiation on fused silica glass substrates seeded by ZnO nanocrystals. The exciton-related UV photoluminescence observed at room temperature at 380 nm increased significantly after a room temperature hydrogen plasma treatment in a negatively self-biased capacitive coupled radio frequency reactor whereas the defect-related yellow photoluminescence was noticeably reduced together with the F+ electron paramagnetic resonance (EPR) signal g = 1.96. Thus, the F+ EPR signals are surface type defects which amount is governed by the surface plasma treatment. The correlation between PL and EPR signals observed in ZnO nanorods exposed to the same treatment relates some optically active defects to paramagnetic centers.
Permanent Link: http://hdl.handle.net/11104/0316848