4.8 Article

Colloidal deposition of colored daytime radiative cooling films using nanoparticle-based inks

期刊

MATERIALS TODAY PHYSICS
卷 21, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.mtphys.2021.100510

关键词

Daytime radiative cooling; Wavelength conversion; Quantum dot; Ternary semiconductor; Nanoparticle-ink coating

资金

  1. Creative Materials Discovery Program of the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2018M3D1A1058972, 2018M3D1A10590]
  2. National Research Foundation of Korea (NRF) - Korea government [2020R1A2C3006382, 2021M3H4A3A01062960, 2021R1A2C1013604]
  3. Technology Innovation Program - Ministry of Trade, Industry & Energy (MOTIE, Korea) [20000887]
  4. National Research Foundation of Korea [2020R1A2C3006382, 2021R1A2C1013604] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

The study fabricated easily applicable and processible colored PDRC films, including white PDRC films and colored PDRC films with Cu-based quantum dots deposition, which efficiently reduce temperature and prevent heating.
In this study, we fabricated easily applicable and processible colored passive daytime radiative cooling (PDRC) films using a solution process with colloidal nanoparticle-based inks. White PDRC films were prepared using hollow silica nanoparticle (H-SiO2)-based colloidal inks and polymeric binders and spray coating. The films have an average reflectivity of 97.2% and emissivity of 94.3% and their temperature is 6.12 degrees C lower than the ambient temperature during the daytime at outdoor measurement. We also fabricated colored PDRC films by depositing Cu-based quantum dots (QDs) on white PDRC films. The Cu-based QDs partially absorb light in the visible spectrum, allowing yellow, red, and brown colors, that are highly efficient in preventing heat generation. The absorbed energy is converted into another wavelength and emitted as photons based on the photoluminescence effect. Based on the wavelength conversion, the yellow, red, and brown PDRC films can re-emit powers of 14.06, 28.36, and 43.92 W/m(2), respectively, resulting in the prevention of heating. The results of outdoor measurements confirm that the temperature of the yellow and red PDRC films decreases by 3.25 and 0.51 degrees C, respectively, compared with the ambient temperature. Furthermore, we numerically and experimentally determined the daytime cooling performance of two brown PDRC films with different quantum efficiencies. Our results confirm that these easily processable colored PDRC films are more efficient daytime cooling than commercial paint color films on various substrates. (C) 2021 Elsevier Ltd. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据