Multi-nanolayered VO2/Sapphire Thin Film via Spinodal Decomposition
- Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Ceramics, State Key Lab. of High Perf. Ceramics and Superfine Microstructure; Univ. of Chinese Academy of Sciences (CAS), Beijing (China)
- Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Ceramics, State Key Lab. of High Perf. Ceramics and Superfine Microstructure
- Aalborg Univ. (Denmark). Section of Chemistry; Wuhan Univ. of Technology (China). State Key Lab. of Silicate Materials for Architectures
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division. Thin Films and Nanostructure Group
- Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Ceramics, State Key Lab. of High Perf. Ceramics and Superfine Microstructure; China Univ. of Petroleum Beijing (China). College of Science. Dept. of Materials Science and Engineering
- Shanghai Univ. (China). School of Materials Science and Engineering
- Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Ceramics, State Key Lab. of High Perf. Ceramics and Superfine Microstructure; National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan). Materials Research Inst. for Sustainable Development
Coating of VO2-based thin film has been extensively studied for fabricating energy-saving smart windows. One of the most efficient ways for fabricating high performance films is to create multinanolayered structure. However, it has been highly challenge to make such layers in the VO2-based films using conventional methods. In this work, a facile two-step approach is established to fabricate multilayered VO2-TiO2 thin films. We first deposited the amorphous thin films upon sputtering, and then anneal them to transform the amorphous phase into alternating Ti- and V-rich multilayered nanostructure via a spinodal decomposition mechanism. In particular, we take advantage of different sapphire substrate planes (A-plane (11–20), R-plane (1–102), C-plane (0001), and M-plane (10-10)) to achieve different decomposition modes. The new approach has made it possible to tailoring the microstructure of the thin films for optimized performances by controlling the disorder-order transition in terms of both kinetic and thermodynamic aspects. The derived thin films exhibit superior optical modulation upon phase transition, significantly reduced transition temperature and hysteresis loop width, and high degradation resistance, these improvements indicate a high potential to be used for fabricating the next generation of energy saving smart windows.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1624391
- Journal Information:
- Scientific Reports, Vol. 8, Issue 1; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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