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Title: Reduction of front-metallization grid shading in concentrator cells through laser micro-grooved cover glass

Abstract

Concentrator solar cell front-grid metallizations are designed so that the trade-off between series resistance and shading factor (SF) is optimized for a particular irradiance. High concentrator photovoltaics (CPV) typically requires a metallic electrode pattern that covers up to 10% of the cell surface. The shading effect produced by this front electrode results in a significant reduction in short-circuit current (I{sub SC}) and hence, in a significant efficiency loss. In this work we present a cover glass (originally meant to protect the cell surface) that is laser-grooved with a micrometric pattern that redirects the incident solar light towards interfinger regions and away from the metallic electrodes, where they would be wasted in terms of photovoltaic generation. Quantum efficiency (QE) and current (I)-voltage (V) characterization under concentration validate the proof-of-concept, showing great potential for CPV applications.

Authors:
; ; ;  [1];  [1]; ;  [2]
  1. CEA-LITEN, Laboratoire de Photovoltaïque à Concentration, INES, Le Bourget du Lac (France)
  2. CEA-LITEN, Laboratoire de Surfaces Nanostructurées, Grenoble (France)
Publication Date:
OSTI Identifier:
22489014
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1679; Journal Issue: 1; Conference: CPV-11: 11. international conference on conventrator photovoltaictaic systems, Aix-les-Bains (France), 13-15 Apr 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; ABUNDANCE; CONCENTRATION RATIO; CONCENTRATOR SOLAR CELLS; DESIGN; ELECTRIC CONDUCTIVITY; ELECTRICAL FAULTS; GLASS; GRIDS; LASERS; PHOTOVOLTAIC EFFECT; QUANTUM EFFICIENCY; RADIANT FLUX DENSITY; REDUCTION; SURFACES; VISIBLE RADIATION

Citation Formats

García-Linares, Pablo, Voarino, Philippe, Besson, Pierre, Baudrit, Mathieu, Dominguez, César, Instituto de Energía Solar - Universidad Politécnica de Madrid, Madrid, Dellea, Olivier, and Fugier, Pascal. Reduction of front-metallization grid shading in concentrator cells through laser micro-grooved cover glass. United States: N. p., 2015. Web. doi:10.1063/1.4931535.
García-Linares, Pablo, Voarino, Philippe, Besson, Pierre, Baudrit, Mathieu, Dominguez, César, Instituto de Energía Solar - Universidad Politécnica de Madrid, Madrid, Dellea, Olivier, & Fugier, Pascal. Reduction of front-metallization grid shading in concentrator cells through laser micro-grooved cover glass. United States. https://doi.org/10.1063/1.4931535
García-Linares, Pablo, Voarino, Philippe, Besson, Pierre, Baudrit, Mathieu, Dominguez, César, Instituto de Energía Solar - Universidad Politécnica de Madrid, Madrid, Dellea, Olivier, and Fugier, Pascal. 2015. "Reduction of front-metallization grid shading in concentrator cells through laser micro-grooved cover glass". United States. https://doi.org/10.1063/1.4931535.
@article{osti_22489014,
title = {Reduction of front-metallization grid shading in concentrator cells through laser micro-grooved cover glass},
author = {García-Linares, Pablo and Voarino, Philippe and Besson, Pierre and Baudrit, Mathieu and Dominguez, César and Instituto de Energía Solar - Universidad Politécnica de Madrid, Madrid and Dellea, Olivier and Fugier, Pascal},
abstractNote = {Concentrator solar cell front-grid metallizations are designed so that the trade-off between series resistance and shading factor (SF) is optimized for a particular irradiance. High concentrator photovoltaics (CPV) typically requires a metallic electrode pattern that covers up to 10% of the cell surface. The shading effect produced by this front electrode results in a significant reduction in short-circuit current (I{sub SC}) and hence, in a significant efficiency loss. In this work we present a cover glass (originally meant to protect the cell surface) that is laser-grooved with a micrometric pattern that redirects the incident solar light towards interfinger regions and away from the metallic electrodes, where they would be wasted in terms of photovoltaic generation. Quantum efficiency (QE) and current (I)-voltage (V) characterization under concentration validate the proof-of-concept, showing great potential for CPV applications.},
doi = {10.1063/1.4931535},
url = {https://www.osti.gov/biblio/22489014}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1679,
place = {United States},
year = {Mon Sep 28 00:00:00 EDT 2015},
month = {Mon Sep 28 00:00:00 EDT 2015}
}