Smart Windows with a VO2Thin Film as a Conductive Layer for Efficient and Independent Dual-Band Modulation

Jingxin Sang; Wenbing Zhu; Yunfei Feng; Yang Liu; Jianhua Shang; Jiatong Sun; Lizheng Guo; Yihong Zhang; Shuguang Zhao; Vladimir Chigrinov; Dae Shik Seo

doi:10.1021/acsaelm.1c00728

Smart Windows with a VO₂Thin Film as a Conductive Layer for Efficient and Independent Dual-Band Modulation

Jingxin Sang, Wenbing Zhu, Yunfei Feng, Yang Liu, Jianhua Shang, Jiatong Sun, Lizheng Guo, Yihong Zhang, Shuguang Zhao, Vladimir Chigrinov, Dae Shik Seo

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Smart windows that can modulate the transmission of sunlight entering the room can significantly reduce energy consumption. Herein, we provide a simple structure for smart windows which can modulate the transmittance of visible (vis) light actively by an external electric field and modulate the transmittance of near-infrared (NIR) light passively by temperature. The dual-band control of vis and NIR light are achieved by polymer-dispersed liquid crystal, vanadium dioxide (VO2), and Al-doped ZnO. The VO2 thin film plays two roles: NIR light control and conductive layer. There are four optical modulation modes for this kind of smart window, that is, (1) vis and NIR light passing mode, (2) vis light blocking and NIR light passing mode, (3) vis light passing and NIR light blocking mode, and (4) vis and NIR light blocking mode. The transmittance in the vis range (Tlum) can be reversibly and actively modulated between 0.38 and 39.93%, and the transmittance in solar irradiation (Tsolar) can be reversibly and passively modulated between 42.32 and 9.95%. In the meantime, the response time (ton) decreases from 114.5 to 5.2 ms when the VO2 thin film changes from monoclinic to rutile phase. The electro-optical measurement indicates smart windows with featured fast response time, long stability, and independent modulation ability. Besides, a house model testing proves an indoor temperature cooling of 7.7 °C. Smart windows with simple structure, large area preparation, and outstanding modulation ability are promising in energy saving in buildings and automobiles.

Original language	English
Pages (from-to)	4882-4890
Number of pages	9
Journal	ACS Applied Electronic Materials
Volume	3
Issue number	11
DOIs	https://doi.org/10.1021/acsaelm.1c00728
Publication status	Published - 2021 Nov 23

Bibliographical note

Funding Information:
The supports of the National Natural Science Foundation of China (NSFC) [61805035] and the Fundamental Research Funds for the Central Universities (DHU Distinguished Young Professor Program) [21D210401] are gratefully acknowledged.

Publisher Copyright:
©

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Materials Chemistry
Electrochemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsaelm.1c00728

Cite this

@article{fe7d54e6e2a54187b2c0cdc8a1b3793c,

title = "Smart Windows with a VO2Thin Film as a Conductive Layer for Efficient and Independent Dual-Band Modulation",

abstract = "Smart windows that can modulate the transmission of sunlight entering the room can significantly reduce energy consumption. Herein, we provide a simple structure for smart windows which can modulate the transmittance of visible (vis) light actively by an external electric field and modulate the transmittance of near-infrared (NIR) light passively by temperature. The dual-band control of vis and NIR light are achieved by polymer-dispersed liquid crystal, vanadium dioxide (VO2), and Al-doped ZnO. The VO2 thin film plays two roles: NIR light control and conductive layer. There are four optical modulation modes for this kind of smart window, that is, (1) vis and NIR light passing mode, (2) vis light blocking and NIR light passing mode, (3) vis light passing and NIR light blocking mode, and (4) vis and NIR light blocking mode. The transmittance in the vis range (Tlum) can be reversibly and actively modulated between 0.38 and 39.93%, and the transmittance in solar irradiation (Tsolar) can be reversibly and passively modulated between 42.32 and 9.95%. In the meantime, the response time (ton) decreases from 114.5 to 5.2 ms when the VO2 thin film changes from monoclinic to rutile phase. The electro-optical measurement indicates smart windows with featured fast response time, long stability, and independent modulation ability. Besides, a house model testing proves an indoor temperature cooling of 7.7 °C. Smart windows with simple structure, large area preparation, and outstanding modulation ability are promising in energy saving in buildings and automobiles.",

author = "Jingxin Sang and Wenbing Zhu and Yunfei Feng and Yang Liu and Jianhua Shang and Jiatong Sun and Lizheng Guo and Yihong Zhang and Shuguang Zhao and Vladimir Chigrinov and Seo, {Dae Shik}",

note = "Funding Information: The supports of the National Natural Science Foundation of China (NSFC) [61805035] and the Fundamental Research Funds for the Central Universities (DHU Distinguished Young Professor Program) [21D210401] are gratefully acknowledged. Publisher Copyright: {\textcopyright} ",

year = "2021",

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doi = "10.1021/acsaelm.1c00728",

language = "English",

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TY - JOUR

T1 - Smart Windows with a VO2Thin Film as a Conductive Layer for Efficient and Independent Dual-Band Modulation

AU - Sang, Jingxin

AU - Zhu, Wenbing

AU - Feng, Yunfei

AU - Liu, Yang

AU - Shang, Jianhua

AU - Sun, Jiatong

AU - Guo, Lizheng

AU - Zhang, Yihong

AU - Zhao, Shuguang

AU - Chigrinov, Vladimir

AU - Seo, Dae Shik

N1 - Funding Information: The supports of the National Natural Science Foundation of China (NSFC) [61805035] and the Fundamental Research Funds for the Central Universities (DHU Distinguished Young Professor Program) [21D210401] are gratefully acknowledged. Publisher Copyright: ©

PY - 2021/11/23

Y1 - 2021/11/23

N2 - Smart windows that can modulate the transmission of sunlight entering the room can significantly reduce energy consumption. Herein, we provide a simple structure for smart windows which can modulate the transmittance of visible (vis) light actively by an external electric field and modulate the transmittance of near-infrared (NIR) light passively by temperature. The dual-band control of vis and NIR light are achieved by polymer-dispersed liquid crystal, vanadium dioxide (VO2), and Al-doped ZnO. The VO2 thin film plays two roles: NIR light control and conductive layer. There are four optical modulation modes for this kind of smart window, that is, (1) vis and NIR light passing mode, (2) vis light blocking and NIR light passing mode, (3) vis light passing and NIR light blocking mode, and (4) vis and NIR light blocking mode. The transmittance in the vis range (Tlum) can be reversibly and actively modulated between 0.38 and 39.93%, and the transmittance in solar irradiation (Tsolar) can be reversibly and passively modulated between 42.32 and 9.95%. In the meantime, the response time (ton) decreases from 114.5 to 5.2 ms when the VO2 thin film changes from monoclinic to rutile phase. The electro-optical measurement indicates smart windows with featured fast response time, long stability, and independent modulation ability. Besides, a house model testing proves an indoor temperature cooling of 7.7 °C. Smart windows with simple structure, large area preparation, and outstanding modulation ability are promising in energy saving in buildings and automobiles.

AB - Smart windows that can modulate the transmission of sunlight entering the room can significantly reduce energy consumption. Herein, we provide a simple structure for smart windows which can modulate the transmittance of visible (vis) light actively by an external electric field and modulate the transmittance of near-infrared (NIR) light passively by temperature. The dual-band control of vis and NIR light are achieved by polymer-dispersed liquid crystal, vanadium dioxide (VO2), and Al-doped ZnO. The VO2 thin film plays two roles: NIR light control and conductive layer. There are four optical modulation modes for this kind of smart window, that is, (1) vis and NIR light passing mode, (2) vis light blocking and NIR light passing mode, (3) vis light passing and NIR light blocking mode, and (4) vis and NIR light blocking mode. The transmittance in the vis range (Tlum) can be reversibly and actively modulated between 0.38 and 39.93%, and the transmittance in solar irradiation (Tsolar) can be reversibly and passively modulated between 42.32 and 9.95%. In the meantime, the response time (ton) decreases from 114.5 to 5.2 ms when the VO2 thin film changes from monoclinic to rutile phase. The electro-optical measurement indicates smart windows with featured fast response time, long stability, and independent modulation ability. Besides, a house model testing proves an indoor temperature cooling of 7.7 °C. Smart windows with simple structure, large area preparation, and outstanding modulation ability are promising in energy saving in buildings and automobiles.

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