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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 21, Iss. S3 — May. 6, 2013
  • pp: A324–A335

Periodic dielectric structures for light-trapping in InGaAs/GaAs quantum well solar cells

Sam Turner, Sudha Mokkapati, Greg Jolley, Lan Fu, Hark Hoe Tan, and Chennupati Jagadish  »View Author Affiliations


Optics Express, Vol. 21, Issue S3, pp. A324-A335 (2013)
http://dx.doi.org/10.1364/OE.21.00A324


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Abstract

We study dielectric diffraction gratings for light-trapping in quantum well solar cells and compare their performance with plasmonic and Lambertian light-trapping structures. The optimum structural parameters are identified for symmetric uni-periodic, symmetric bi-periodic and asymmetric bi-periodic gratings. The enhancement in short-circuit current density from the quantum well region with respect to a reference cell with no diffraction grating is calculated. The ratio of this enhancement to the maximum achievable enhancement (i.e. no transmission losses) is 33%, 75% and 74%, respectively for these structures. The optimum asymmetric and symmetric bi-periodic structures perform closest to Lambertian light-trapping, while all three optimum grating structures outperform optimum plasmonic light-trapping. We show that the short-circuit current density from the quantum well region is further enhanced by incorporating a rear reflector.

© 2013 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:
Diffraction and Gratings

History
Original Manuscript: February 15, 2013
Revised Manuscript: March 21, 2013
Manuscript Accepted: March 22, 2013
Published: April 2, 2013

Citation
Sam Turner, Sudha Mokkapati, Greg Jolley, Lan Fu, Hark Hoe Tan, and Chennupati Jagadish, "Periodic dielectric structures for light-trapping in InGaAs/GaAs quantum well solar cells," Opt. Express 21, A324-A335 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-S3-A324


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