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Demonstration of enhanced absorption in thin film Si solar cells with textured photonic crystal back reflector

Appl. Phys. Lett. 93, 221105 (2008); doi:10.1063/1.3039787

Published 1 December 2008

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L. Zeng,1 P. Bermel,2 Y. Yi,1 B. A. Alamariu,3 K. A. Broderick,3 J. Liu,1 C. Hong,1 X. Duan,1 J. Joannopoulos,2 and L. C. Kimerling1
1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
2Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
3Microsystems Technology Laboratories, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
Herein the authors report the experimental application of a powerful light trapping scheme, the textured photonic crystal (TPC) backside reflector, to thin film Si solar cells. TPC combines a one-dimensional photonic crystal as a distributed Bragg reflector with a diffraction grating. Light absorption is strongly enhanced by high reflectivity and large angle diffraction, as designed with scattering matrix analysis. 5  µm thick monocrystalline thin film Si solar cells integrated with TPC were fabricated through an active layer transfer technique. Measured short circuit current density Jsc was increased by 19%, compared to a theoretical prediction of 28%. ©2008 American Institute of Physics
History: Received 18 August 2008; accepted 8 November 2008; published 1 December 2008
Permalink: http://link.aip.org/link/?APPLAB/93/221105/1

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KEYWORDS and PACS

Keywords
PACS
  • 84.60.Jt
    Photoelectric conversion: solar cells and arrays
  • 42.70.Qs
    Photonic bandgap materials
  • 42.79.Dj
    Gratings
  • YEAR: 2008

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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REFERENCES (22)
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