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Passive Cooling Enabled by Polymer Composite Coating: Dependence on Filler, Filler Size and Coating Thickness

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Abstract

The effective passive radiation cooling that is enabled by silicone-based composites is investigated for its dependence on coating thickness and filler size in the range of nanometers to micrometers. It is established, contrary to prior reports, that the effective passive radiation cooling does not exhibit a filler size dependence, i.e., there is no optimal size at which a maximum cooling would be reached. However, the apparent cooling effect is filler type dependent and among the fillers investigated, Al2O3 exhibits the best apparent cooling effect. In addition, the apparent cooling effect is dependent on coating thickness: the thickness dependence is non-monotonic, and the maximum cooling occurs at an optimal thickness of 70 μm, regardless of filler type. Potential significant implications of the findings are also discussed.

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Authors and Affiliations

  1. Optoelectronics Packaging and Materials Labs, Henry Samueli School of Engineering, University of California, Irvine, CA, 92697, USA

    Yue Shao & Frank G. Shi

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  1. Yue Shao
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  2. Frank G. Shi
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Correspondence to Yue Shao.

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Shao, Y., Shi, F.G. Passive Cooling Enabled by Polymer Composite Coating: Dependence on Filler, Filler Size and Coating Thickness. J. Electron. Mater. 46, 4057–4061 (2017). https://doi.org/10.1007/s11664-017-5361-8

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  • DOI: https://doi.org/10.1007/s11664-017-5361-8

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