RT Conference Proceedings
SR 00
A1 Morales Furió, Miguel
A1 Chen, Yu
A1 Muñoz Martín, David
A1 Lauzurica Santiago, Sara
A1 Molpeceres Álvarez, Carlos Luis
T1 High volume transfer of high viscosity silver pastes using Laser Direct-Write Processing for metallization of c-Si cells
YR 2015
FD 07th February 2015
SP 1
OP 7
AB 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.
T2 Laser-based Micro- and Nanoprocessing IX
ED San Francisco (EEUU)
AV Unpublished
LK https://oa.upm.es/42299/