Light trapping properties of cylindrical well diffraction gratings in solar cells: Computational calculations

Martí Vega, Antonio and Luque López, Antonio and Tobías Galicia, Ignacio and Mellor Null, Alexander Virgil (2010). Light trapping properties of cylindrical well diffraction gratings in solar cells: Computational calculations. In: "25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion", 06/09/2010 - 10/09/2010, Valencia, España.

Description

Title: Light trapping properties of cylindrical well diffraction gratings in solar cells: Computational calculations
Author/s:
  • Martí Vega, Antonio
  • Luque López, Antonio
  • Tobías Galicia, Ignacio
  • Mellor Null, Alexander Virgil
Item Type: Presentation at Congress or Conference (Article)
Event Title: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion
Event Dates: 06/09/2010 - 10/09/2010
Event Location: Valencia, España
Title of Book: Proceedings of the 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion
Date: 2010
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Electrónica Física
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Light trapping using diffraction gratings is a promising approach to increasing absorption in solar cells. In this paper, the computationally calculated absorption enhancement expected from a diffraction grating consisting of a triangular array of cylindrical wells is presented. Angle-extended polychromatic illumination is considered, and special attention is paid to absorption of sub-bandgap photons in an intermediate band solar cell. Results are compared to the absorption enhancement expected from an ideal Lambertian (randomizing) scatterer, which is considered as a baseline. It is found that for cells which absorb very weakly, the diffraction grating provides absorption enhancement above that of the ideal Lambertian scatterer over a wide wavelength range. For cells which absorb more strongly, the grating underperforms the ideal Lambertian scatterer over almost all wavelengths. Finally, the grating period, well height and well radius are optimised. Keywords: Light Trapping, Diffraction Grating, Intermediate Band Solar Cell

More information

Item ID: 8896
DC Identifier: http://oa.upm.es/8896/
OAI Identifier: oai:oa.upm.es:8896
Official URL: http://www.photovoltaic-conference.com/
Deposited by: Memoria Investigacion
Deposited on: 22 Sep 2011 10:00
Last Modified: 20 Apr 2016 17:32
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