An Ultrathin Transparent Radiative Cooling Photonic Structure with a High NIR Reflection

Saichao Dang, Xiaojia Wang, Hong Ye

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

With a high NIR reflection, a transparent radiative cooling photonic structure consisting of 2D silica gratings atop ZnO/Ag/ZnO is conceived and demonstrated. With 77% visible light transmitted, 57% NIR solar radiation reflected and 91% thermal infrared radiation emitted, a synthetical cooling is realized by this photonic structure. The theoretical total cooling power of this structure is more than double that of a planar silica and is 63.3% higher than that of a typical NIR reflecting filter, that is, ZnO/Ag/ZnO film. The field test facing the sunlight shows that the air temperature inside a chamber sealed with this structure is 12.5 and 2.5 °C lower than that sealed with planar silica and ZnO/Ag/ZnO, respectively. This work shows that the concept of daytime radiative cooling can be applied in combination with the utilization of visible light and the proposed ultrathin photonic structure shows potentials for passive radiative cooling of transparent applications.

Original languageEnglish (US)
Article number2201050
Pages (from-to)2201050
JournalAdvanced Materials Interfaces
Volume9
Issue number30
DOIs
StatePublished - Oct 21 2022

Bibliographical note

Funding Information:
This work was funded by the National Natural Science Foundation (No. 51576188). This work was partially carried out at USTC Center for Micro and Nanoscale Research and Fabrication, and the authors thank all the engineers (Yu Wei, Yizhao He, Chi Tang, Fangfang Peng, Xiuxia Wang, Wenjuan Li, Kun Xu, etc.) in the center very much for their help with micro/nano fabrication. They thank the spectral measurements with the shared facilities at the University of Minnesota, partially supported by the National Science Foundation through the UMN MRSEC (No. DMR-2011401). The authors also give thanks to Hongxin Yao, Wei Yang, and Jun Zhou for their help with the measurements of optical properties. The authors thank Fan Yang for his help with the outdoor test. The authors give special thanks to Linshuang Long (USTC) and Qiaoqiang Gan (UB) for their constructive advice.

Funding Information:
This work was funded by the National Natural Science Foundation (No. 51576188). This work was partially carried out at USTC Center for Micro and Nanoscale Research and Fabrication, and the authors thank all the engineers (Yu Wei, Yizhao He, Chi Tang, Fangfang Peng, Xiuxia Wang, Wenjuan Li, Kun Xu, etc.) in the center very much for their help with micro/nano fabrication. They thank the spectral measurements with the shared facilities at the University of Minnesota, partially supported by the National Science Foundation through the UMN MRSEC (No. DMR‐2011401). The authors also give thanks to Hongxin Yao, Wei Yang, and Jun Zhou for their help with the measurements of optical properties. The authors thank Fan Yang for his help with the outdoor test. The authors give special thanks to Linshuang Long (USTC) and Qiaoqiang Gan (UB) for their constructive advice.

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Keywords

  • dielectric/metal/dielectric (D/M/D)
  • NIR reflection
  • photonic structure
  • transparent radiative cooling

How much support was provided by MRSEC?

  • Shared

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