Zhang, Y;
Li, B;
Wang, Z;
Tian, S;
Liu, B;
Zhao, X;
Li, N;
... Wang, S; + view all
(2021)
Facile Preparation of Zn₂V₂O₇–VO₂ Composite Films with Enhanced Thermochromic Properties for Smart Windows.
ACS Applied Electronic Materials
, 3
(5)
pp. 2224-2232.
10.1021/acsaelm.1c00176.
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Sankar_Facile Preparation of Zn₂V₂O₇–VO₂ Composite Films with Enhanced Thermochromic Properties for Smart Windows_AAM.pdf - Accepted Version Download (1MB) | Preview |
Abstract
Usually, VO_{2} films prepared by a magnetron sputtering method exhibit good durability and excellent solar modulation efficiency (ΔT_{sol}). However, its undesirable low-temperature luminous transmittance (Tlum) limits its application in smart windows since the dense film composed of VO_{2} nanocrystals with narrow band gaps can absorb more visible light. In this work, a Zn_{2}V_{2}O_{7}–VO_{2} composite film was deposited on quartz glass by a facile magnetron sputtering method followed by postannealing at 450 °C, in which transparent Zn_{2}V_{2}O_{7} aimed to improve the optical performance. The composite film showed an enhanced thermochromic performance with a ΔT_{sol} of 11.5%, a T_{lum} of 49.0%, and a phase transition temperature (Tc) of 43.8 °C compared with a pure VO_{2} film (T_{lum} = 34.1%, ΔT_{sol} = 10.9%, Tc = 49.2 °C). This was probably attributed to the formation and uniform distribution of Zn_{2}V_{2}O_{7} in the composite film, which could widen the optical band gap, leading to the improvement in the optical properties. The interface between Zn_{2}V_{2}O_{7} and VO_{2} could produce interfacial stress to reduce the phase transition temperature. Therefore, this work can provide a facile way to improve the thermochromic performance of VO-{2}-based films and promote their application in the field of energy-saving glass.
| Type: | Article |
|---|---|
| Title: | Facile Preparation of Zn₂V₂O₇–VO₂ Composite Films with Enhanced Thermochromic Properties for Smart Windows |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acsaelm.1c00176 |
| Publisher version: | https://doi.org/10.1021/acsaelm.1c00176 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | Zn₂V₂O₇–VO₂, composite film, magnetron sputtering, solar modulation, efficiency, luminous transmittance, phase transition temperature |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10130605 |
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