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Optica

| RAPID DISSEMINATION OF HIGH-IMPACT RESULTS

  • Editor: Alex Gaeta
  • Vol. 1, Iss. 1 — Jul. 2014
  • pp: 32–38

Radiative cooling of solar cells

Linxiao Zhu, Aaswath Raman, Ken Xingze Wang, Marc Abou Anoma, and Shanhui Fan  »View Author Affiliations


Optica, Vol. 1, Issue 1, pp. 32-38 (2014)
http://dx.doi.org/10.1364/OPTICA.1.000032


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Abstract

Standard solar cells heat up under sunlight. The resulting increased temperature of the solar cell has adverse consequences on both its efficiency and its reliability. We introduce a general approach to radiatively lower the operating temperature of a solar cell through sky access, while maintaining its solar absorption. We first present an ideal scheme for the radiative cooling of solar cells. For an example case of a bare crystalline silicon solar cell, we show that the ideal scheme can passively lower its operating temperature by 18.3 K. We then demonstrate a microphotonic design based on real material properties that approaches the performance of the ideal scheme. We also show that the radiative cooling effect is substantial, even in the presence of significant convection and conduction and parasitic solar absorption in the cooling layer, provided that we design the cooling layer to be sufficiently thin.

© 2014 Optical Society of America

OCIS Codes
(350.6050) Other areas of optics : Solar energy
(230.5298) Optical devices : Photonic crystals
(290.6815) Scattering : Thermal emission

History
Original Manuscript: March 31, 2014
Revised Manuscript: May 13, 2014
Manuscript Accepted: May 17, 2014
Published: July 22, 2014

Citation
Linxiao Zhu, Aaswath Raman, Ken Xingze Wang, Marc Abou Anoma, and Shanhui Fan, "Radiative cooling of solar cells," Optica 1, 32-38 (2014)
http://www.opticsinfobase.org/optica/abstract.cfm?URI=optica-1-1-32


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