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Application of Single-Wall Carbon Nanotubes as Transparent Electrodes in Cu(In,Ga)Se2-Based Solar Cells

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9 Author(s)
Contreras, M. ; Nat. Renewable Energy Lab., Golden, CO ; Barnes, T. ; van de Lagemaat, J. ; Rumbles, G.
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We present a new thin-film solar cell structure in which the traditional transparent conductive oxide electrode (ZnO) is replaced by a transparent conductive coating consisting of a network of bundled single-wall carbon nanotubes. Optical transmission properties of these coatings are presented in relation to their electrical properties (sheet resistance), along with preliminary solar cell results from devices made using CuIn1-xGaxSe2 thin-film absorber materials. Achieving an energy conversion efficiency of >12% and a quantum efficiency of ~80% demonstrate the feasibility of the concept. A discussion of the device structures will be presented considering the physical properties of the new electrodes comparing current-voltage results from the new solar cell structure and those from standard ZnO/CdS/Cu(In,Ga)Se2/Mo solar cells

Published in:

Photovoltaic Energy Conversion, Conference Record of the 2006 IEEE 4th World Conference on  (Volume:1 )

Date of Conference:

May 2006