 Radiative cooling of solar cells with micro-grating photonic coolerBin Zhao, Kegui Lu, Mingke Hu, Jie Liu, Lijun Wu, Chengfeng Xu, Qingdong Xuan and Gang Pei Renewable Energy, 2022, vol. 191, issue C, 662-668 Abstract: Radiative cooling of solar cells has been proposed in recent years and has elicited much interest from fields of materials science to engineering science. Herein, a silica micro-grating photonic cooler is proposed, designed, and fabricated to radiatively cool solar cells. It is shown that the micro-grating silica can not only improve the thermal emissivity of the bulk silica to over 0.9 required for enhanced radiative cooling of solar cells but also exhibits a slight anti-reflection effect for sunlight. The outdoor experiment demonstrates that the proposed cooler can passively reduce the temperature of the commercial silicon cell by 3.6 °C when applied on the top of the cell under solar irradiance range from approximately 830 W m−2 to 990 W m−2, even though the cell already possesses a strong thermal emissivity of 0.67 and such a cooler slightly enhance the light trapping effect of the cell. This work provides an alternative way to design the solar-transparent infrared-emissive cooler for enhanced radiative cooling of solar cells and shows its cooling potential. Keywords: Radiative cooling; Solar cells; Atmospheric window; Thermal emission; Photonic crystal (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:191:y:2022:i:c:p:662-668 DOI: 10.1016/j.renene.2022.04.063 Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
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