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Proceedings Paper

A nanoparticle ink printing process for all printed thin film copper-indium-selenide (CIS) solar cells
Author(s): X. Charles Li; Istvan Soltesz; Mindy Wu; Frank Ziobro; Roger Amidon; Zoltan Kiss
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Paper Abstract

Copper indium selenide (CIS) or its derivatives (such as gallium doped CIS and sulfur substituted CIS) are considered the best optical absorber material used in polycrystalline thin film photovoltaic solar cells due to their favorable electrical and optical properties, and long term stability. To develop a low cost yet high throughput thin film deposition process with both composition and film uniformity control, precursor ink has been formulated using nanoparticle metal oxide of copper and indium in an organic solvent system dissolved with selenium or sulfur. Smooth thin film of precursor oxide mixture has been demonstrated by wet printing process. Upon heat treatment of the precursor thin film under atmosphere of selenium and/or sulfur, copper-indium selenide and/or sulfide (CIS) was formed. Several approaches of nanoparticle ink coating processes have been investigated through spin-coating, screen-printing and contact printing. For using glass substrate, contact printing demonstrated superior uniformity and composition control. By using a post-thermal treatment process on the nanoparticle-coated film, good morphology thin film with composition control was achieved. Both the chemical composition and physical morphology has been investigated using ICP-OES and XRD measurements. Based on molybdenum glass substrate, all-printed solar cells have been demonstrated.

Paper Details

Date Published: 11 September 2008
PDF: 9 pages
Proc. SPIE 7047, Nanoscale Photonic and Cell Technologies for Photovoltaics, 70470E (11 September 2008);
Show Author Affiliations
X. Charles Li, Renewable Energy Solutions, Inc. (United States)
Istvan Soltesz, Renewable Energy Solutions, Inc. (United States)
Mindy Wu, Renewable Energy Solutions, Inc. (United States)
Frank Ziobro, Renewable Energy Solutions, Inc. (United States)
Roger Amidon, Renewable Energy Solutions, Inc. (United States)
Zoltan Kiss, Renewable Energy Solutions, Inc. (United States)

Published in SPIE Proceedings Vol. 7047:
Nanoscale Photonic and Cell Technologies for Photovoltaics
Loucas Tsakalakos, Editor(s)

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