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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S6 — Oct. 20, 2014
  • pp: A1422–A1430

Pyramidal surface textures for light trapping and antireflection in perovskite-on-silicon tandem solar cells

Bennett W. Schneider, Niraj N. Lal, Simeon Baker-Finch, and Thomas P. White  »View Author Affiliations


Optics Express, Vol. 22, Issue S6, pp. A1422-A1430 (2014)
http://dx.doi.org/10.1364/OE.22.0A1422


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Abstract

Perovskite-on-silicon tandem solar cells show potential to reach > 30% conversion efficiency, but require careful optical control. We introduce here an effective light-management scheme based on the established pyramidal texturing of crystalline silicon cells. Calculations show that conformal deposition of a thin film perovskite solar cell directly onto the textured front surface of a high efficiency silicon cell can yield front surface reflection losses as low as 0.52mA/cm2. Combining this with a wavelength-selective intermediate reflector between the cells additionally provides effective light-trapping in the high-bandgap top cell, resulting in calculated absolute efficiency gains of 2 – 4%. This approach provides a practical and effective method to adapt existing high efficiency silicon cell designs for use in tandem cells, with conversion efficiencies approaching 35%.

© 2014 Optical Society of America

OCIS Codes
(230.1480) Optical devices : Bragg reflectors
(310.1210) Thin films : Antireflection coatings
(350.6050) Other areas of optics : Solar energy
(310.4165) Thin films : Multilayer design

ToC Category:
Light Trapping for Photovoltaics

History
Original Manuscript: July 11, 2014
Revised Manuscript: August 4, 2014
Manuscript Accepted: August 17, 2014
Published: August 28, 2014

Citation
Bennett W. Schneider, Niraj N. Lal, Simeon Baker-Finch, and Thomas P. White, "Pyramidal surface textures for light trapping and antireflection in perovskite-on-silicon tandem solar cells," Opt. Express 22, A1422-A1430 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-S6-A1422


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