Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
High volume transfer of high viscosity silver pastes using Laser Direct- Write Processing for metallization of c-Si cells
Year:2015
Research Areas
  • Physics - Plasma and fluid,
  • Engineering,
  • Mechanical engineering
Information
Abstract
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.
International
Si
Congress
Photonics West 2015
960
Place
San Francisco (EEUU)
Reviewers
Si
ISBN/ISSN
0277-786X
10.1117/12.2080092
Start Date
07/02/2015
End Date
12/02/2015
From page
1
To page
7
Proc. of SPIE Vol. 9351
Participants
  • Autor: Miguel Morales Furio (UPM)
  • Autor: Yu Chen . (UPM)
  • Autor: David Muñoz Martin (UPM)
  • Autor: Sara Lauzurica Santiago (UPM)
  • Autor: Carlos Luis Molpeceres Alvarez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Manufactura Avanzada con Láser
  • Centro o Instituto I+D+i: Centro Laser
  • Departamento: Física Aplicada e Ingeniería de Materiales
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