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Recent progress in transparent conducting materials by use of metallic grids on metaloxides

Published online by Cambridge University Press:  28 June 2011

Joop van Deelen ,
Henk Rendering  and
Arjan Hovestad
Joop van Deelen*
Affiliation:
Netherlands Organization for Applied Scientific Research (TNO), PO Box 6235, 5600 HE Eindhoven, The Netherlands
Henk Rendering
Affiliation:
Netherlands Organization for Applied Scientific Research (TNO), PO Box 6235, 5600 HE Eindhoven, The Netherlands
Arjan Hovestad
Affiliation:
Netherlands Organization for Applied Scientific Research (TNO), PO Box 6235, 5600 HE Eindhoven, The Netherlands
*
*corresponding author: joop.vandeelen@tno.nl
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Abstract

Alternatives to ITO are under heavy investigation. Organic and inorganic transparent conducting materials are compared based on their transparency versus sheet resistance characteristics. Although graphene has advanced recently, TCOs are still superior in performance and can only be surpassed by the combination of transparent materials with a metal grid. Results on modeling and design optimization using a monolithically integrated CIGS cell configuration as case showed that considerable efficiency enhancement (up to 17% in power output compared to single TCOs) can be achieved for metal grid/TCO combinations. Conductivity improvement has been experimentally verified by four point probe measurements. on both commercial ITO coated PET foil as well as on ZnO coated glass with electrochemically deposited metal grids Sheet resistances as low as 0,1 Ohm/sq were reached and 80 times and 400 times conductivity improvements were obtained at a transparency loss of only 3% and 6%, respectively. It was also found that electrochemical deposition results in more conductive grids than obtained by Ag-ink screen printing due to higher aspect ratios and bulk-like conductivity of the first. Simultaneously, nanopatterning allows optimal grid width of 20 μm, as determined by modeling.

Keywords

electrical propertieselectrodepositionphotovoltaic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1323: Symposium C – Advanced Materials Processing for Scalable Solar-Cell Manufacturing , 2011 , mrss11-1323-c02-09
Copyright
Copyright © Materials Research Society 2011

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References

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