Study on the effect of Nb doping on the phase transition temperature of VO2

Xiaoyue Li; Yixin Wang; Bojian Fan; Hong Li; Sujun Shi; Bing Zheng

doi:10.1117/12.2635176

25 April 2022 Study on the effect of Nb doping on the phase transition temperature of VO₂

Xiaoyue Li, Yixin Wang, Bojian Fan, Hong Li, Sujun Shi, Bing Zheng

Proceedings Volume 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022); 122441R (2022) https://doi.org/10.1117/12.2635176
Event: 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 2022, Guilin, China

Abstract

The application of VO₂ is limited by its phase transition temperature from metal to insulator. In this work, a two-step hydrothermal method was applied to explore the thermodynamic properties of Nb-doped VO₂. In this way, the temperature of metal-to-insulator transition was largely reduced from 71°C for pure VO₂ to 34°C for Nb-doped VO₂. Furthermore, based on the first principles calculation, we investigated the lattice and electronic performances for pure and Nb-doped VO₂. The calculations indicated that the difference between monoclinic and metallic structure of Nb-doped VO₂ became less than those of pure VO2, which was caused by the displacement of Nb atom. This change played a key role on decreasing the phase transition temperature. In addition, the results of density of states showed that conductivity of Nb-doped VO₂ didn’t change too much.

Citation Download Citation

Xiaoyue Li, Yixin Wang, Bojian Fan, Hong Li, Sujun Shi, and Bing Zheng "Study on the effect of Nb doping on the phase transition temperature of VO₂", Proc. SPIE 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 122441R (25 April 2022); https://doi.org/10.1117/12.2635176

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