title: High volume transfer of high viscosity silver pastes using Laser Direct-Write Processing for metallization of c-Si cells
creator: Morales Furió, Miguel
creator: Chen, Yu
creator: Muñoz Martín, David
creator: Lauzurica Santiago, Sara
creator: Molpeceres Álvarez, Carlos Luis
subject: Physics
subject: Mechanics
description: The main objective of this work is to adapt Laser Induced Forward Transfer (LIFT), a well-known laser direct writing technique for material transfer, to define metallic contacts (fingers and busbars) onto c-Si cells. A layer of a commercial silver paste (viscosity around 30-50 kcPs), with thickness in the order of tens of microns, is applied over a glass substrate using a coater.. The glass with the silver paste is set at a controlled gap over the c-Si cell. A solid state pulsed laser (532 nm) is focused on the glass/silver interface producing a droplet of silver that it is transferred to the acceptor substra.te The process parameters (silver paste thickness, gap and laser parameters -spot size, pulse energy and overlapping of pulses) are modified and the morphology of the voxels is studied using confocal microscopy. Long lines are printed with a scanner and their uniformity, width, and height are studied. Examples of metallization of large areas (up to 10 cm x 10 cm) over c-Si cells are presented.
publisher: E.T.S.I. Industriales (UPM)
rights: https://creativecommons.org/licenses/by-nc-nd/3.0/es/
date: 2015
type: info:eu-repo/semantics/conferenceObject
type: Presentation at Congress or Conference
source: Laser-based Micro- and Nanoprocessing IX | Laser-based Micro- and Nanoprocessing IX | 07th February 2015 | San Francisco (EEUU)
type: NonPeerReviewed
format: application/pdf
language: eng
relation: info:eu-repo/grantAgreement/EC/FP7/FP7-2013-NMP-ICT-FOF. 609355
relation: info:eu-repo/grantAgreement/MINECO//ENE2011-23359
relation: info:eu-repo/grantAgreement/MINECO//ENE2013-48629-C4-3-R
rights: info:eu-repo/semantics/openAccess
identifier: https://oa.upm.es/42299/