Experimental demonstration of dynamic thermal regulation using vanadium dioxide thin films

被引：62

作者：

Morsy, Ahmed M. ^{[1
]}

Barako, Michael T. ^{[2
]}

Jankovic, Vladan ^{[2
]}

Wheeler, Virginia D. ^{[3
]}

Knight, Mark W. ^{[2
]}

Papadakis, Georgia T. ^{[2
,4
]}

Sweatlock, Luke A. ^{[2
]}

Hon, Philip W. C. ^{[2
]}

Povinelli, Michelle L. ^{[1
]}

机构：

[1] Univ Southern Calif, Ming Hsieh Dept Elect & Comp Engn, Los Angeles, CA 90089 USA

[2] NG Next Northrop Grumman Corp, 1 Space Pk Dr, Redondo Beach, CA 90278 USA

[3] US Naval Res Lab, Washington, DC 20375 USA

[4] Stanford Univ, Dept Elect Engn, Ginzton Lab, Stanford, CA 94305 USA

来源：

SCIENTIFIC REPORTS | 2020年 / 10卷 / 01期

基金：

美国国家科学基金会;

关键词：

OPTICAL-PROPERTIES; VO2;

D O I：

10.1038/s41598-020-70931-0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We present an experimental demonstration of passive, dynamic thermal regulation in a solid-state system with temperature-dependent thermal emissivity switching. We achieve this effect using a multilayered device, comprised of a vanadium dioxide (VO2) thin film on a silicon substrate with a gold back reflector. We experimentally characterize the optical properties of the VO2 film and use the results to optimize device design. Using a calibrated, transient calorimetry experiment we directly measure the temperature fluctuations arising from a time-varying heat load. Under laboratory conditions, we find that the device regulates temperature better than a constant emissivity sample. We use the experimental results to validate our thermal model, which can be used to predict device performance under the conditions of outer space. In this limit, thermal fluctuations are halved with reference to a constant-emissivity sample.

引用

页数：10

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