4.8 Article

Sputtering Flexible VO2 Films for Effective Thermal Modulation

期刊

ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 24, 页码 28105-28113

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c05482

关键词

vanadium dioxide; flexible; colorless polyimide; smart window; durability

资金

  1. Key Collaborative Research Program of the Alliance of International Science Organizations [ANSO-CR-KP-2021-01]
  2. National Natural Science Foundation of China [51972328, 62175248, 52102371]
  3. Youth Innovation Promotion Association, Chinese Academy of Sciences [2018288]
  4. Shanghai B&R International Cooperation Program [20640770200]
  5. Shanghai Science and Technology Innovation Action Plan Intergovernmental International Science and Technology Cooperation Program [21520712500]

向作者/读者索取更多资源

The study successfully designed and fabricated a flexible ITO/VO2/ITO (IVI) film with great potential in the field of smart windows. This film enhances luminous transmittance and solar modulation ability, reduces thermal emissivity, and exhibits better durability compared to previous structures.
Flexible vanadium dioxide (VO2) thermochromic films show great potential for large-scale fabrication and possess broader applications compared with VO2 coatings on rigid substrates. However, the fabrication of flexible VO2 films remains a challenge so far, leading to the scarcity of research on flexible VO2 films for smart windows. With the aim to obtain a flexible VO2-based films with excellent optical properties and a long service life, we designed and successfully fabricated a flexible ITO/VO2/ITO (IVI) film on the colorless transparent polyimide substrate, which could be directly attached to glasses for indoor temperature modulation. This flexible IVI film effectively enhances the luminous transmittance (T-lum) and solar modulation ability (Delta T-sol) (15 and 68% increase relative to a VO2 single layer), reduces the thermal emissivity (epsilon(T)) (50.7% decrease relative to a VO2 single layer), and exhibits better durability than previously reported structures. Such excellent comprehensive performance offers it great potential in practical applications on smart windows. This work is supposed to provide a new strategy for facile direct fabrication of flexible VO2 films and broaden the applications of flexible VO2 in more coatings and devices.

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