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Verfahren zur Metallisierung von Solarzellen, Hotmelt-Aerosol-Tinte und Aerosol-Jet-Drucksystem

Conductive structures applying method for solar cells, involves applying conductive contact to substrate surface of solar cell, and partially heating printing device such that aerosol ink exhibits viscosity less than or equal to one
 
: Hörteis, M.; Richter, P.; Glunz, S.

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Frontpage ()

DE 102007058972 A: 20071207
DE 102007058972 A: 20071207
H01L0031
B41J0002
B05D0001
B41M0005
H01L0021
German
Patent, Electronic Publication
Fraunhofer ISE ()

Abstract
(A1) Die vorliegende Erfindung betrifft ein neuartiges Verfahren zum Aufbringen von leitfaehigen Strukturen auf Solarzellen, wobei mittels eines Aerosol-Jet-Drucksystems eine Hotmelt-Aerosol-Tinte zerstaeubt und in Richtung der Solarzelle aus dem Drucksystem ausgetragen wird, wobei das Drucksystem mindestens teilweise beheizt wird, um die Viskositaet der eingesetzten Tinte niedrig zu halten. Beim Auftreffen auf das nicht beheizte Substrat (Solarzelle) erstarrt die Tinte.

 

WO 2009071145 A2 UPAB: 20090629 NOVELTY - The method involves atomizing a hot-melt aerosol ink by an aerosol jet printing device (9), and applying a conductive contact to a substrate surface of a solar cell. The printing device is partially heated such that the aerosol ink exhibits viscosity less than or equal to one with a temperature of 40 degree Celsius. The aerosol ink contains 50 to 80 weight percent of conductive particle as solid, which is dispersed in a thermoplastic connection. The substrate surface is formed from coated or uncoated silicon and glass. DETAILED DESCRIPTION - The solvent is selected from the group consisting of glycol ether, n-methylpyrrolidone, 2- (2-Butoxyethoxy) ethanol and their mixtures. The thermoplastic connection is selected from the group consisting of C14 to C20 linear alcohols, thermoplastic polymer and C14 to C16 linear aliphatic alcohols. INDEPENDENT CLAIMS are also included for the following: (1) a hot-melt aerosol ink (2) an aerosol jet printing system. USE - Method for applying conductive structures to solar cells. ADVANTAGE - The method enables manufacturing of the conductive structures in the solar cells in an optimized manner, and allows automated and reproducible deposition of metallization on the solar cells. The method improves the aspect ratio of the applied conductive contact.

: http://publica.fraunhofer.de/documents/N-106466.html