Influence of precursors and growth conditions on defect states in ZnO nanorods

0521976 - FZÚ 2020 RIV SK eng C - Conference Paper (international conference)
Buryi, Maksym - Babin, Vladimir - Mičová, J. - Remeš, Zdeněk
Influence of precursors and growth conditions on defect states in ZnO nanorods.
Extended Abstract Book of international conference Progress in Applied Surface - SURFINT-SREN VI. Bratislava: Comenius University, 2019, s. 18-19. ISBN 978-80-223-4811-9.
[Progress in Applied Surface, Interface and Thin Film Science 2019. Florence (IT), 18.11.2019-21.11.2019]
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 * electron paramagnetic resonance (EPR) * thermally stimulated luminescence (TLS)
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

EPR, TSL, radioluminescence (RL) and photoluminescence (PL) methods were engaged in investigation of ZnO nanorods. In the sample of the best purity grown from “fresh” starting materials, only the signal at 1.96 g factor was observed in EPR spectra as well as in the commercial one (shown in Fig. 1) whereas, the other two exhibit also some other resonances probably partly coming from residuals. All the samples were irradiated with X-rays, demonstrating change in the g = 1.96 signal intensity. This corresponds to the electron trapping processes in the materials at the same type oxygen vacancies as assumed above. Consequent stepwise (pulse) annealing up to 300 ºC removed the extra intensity of the resonances making evidence of the trapped electron deliberation. EPR intensity is directly proportional to the paramagnetic particles concentration.
Permanent Link: http://hdl.handle.net/11104/0306515