Department of Physics and Chemistry
Multifunctional films and nanostructures Lab
1. Journal Articles
Degradation mechanism of vanadium oxide films when grown on Y-stabilized ZrO2 above 500 oC
- Title
- Degradation mechanism of vanadium oxide films when grown on Y-stabilized ZrO2 above 500 oC
- Author(s)
- Choi, Songhee ; Oh, Junhyeob ; Lee, Ji-Hyun ; Jang, Jae Hyuck ; Lee, Shinbuhm
- Issued Date
- 2019-12
- Citation
- Advanced Engineering Materials, v.21, no.12, pp.1900918
- Type
- Article
- Author Keywords
- degradation ; diffusion ; vanadium oxides ; Y-stabilized ZrO2
- Keywords
- TRANSITION ; VO2 ; SEMICONDUCTOR
- ISSN
- 1438-1656
- Abstract
- Although vanadium oxide (VOx) phases are thermodynamically similar, Y-stabilized ZrO2 (YSZ) substrates show selective growth as single-crystalline films. However, in this study, we find that the films degrade with the formation of nanoislands when evaporating VOx onto YSZ at a substrate temperature >500 °C. The nanoislands are epitaxial, i.e., Y-doped VO2(R) at an oxygen partial pressure (Formula presented.) < 30 mTorr, and YVO4 at (Formula presented.) > 50 mTorr. Energy-dispersive X-ray spectroscopy shows that the rapid diffusion of vanadium and yttrium plays a critical role in film degradation. The degradation mechanism revealed herein guides the fabrication of VOx films for energy and electronic device applications. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
- Publisher
- John Wiley & Sons Ltd.
- Related Researcher
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Lee, Shinbuhm
- Research Interests Multifunctional films; Experimental condensed matter physics
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- Department of Physics and Chemistry Multifunctional films and nanostructures Lab 1. Journal Articles
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