Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Characterization of direct- and back-scribing laser patterning of SnO2:F for a-Si:H PV module fabrication.
Year:2012
Research Areas
  • Engineering
Information
Abstract
In thin film amorphous-silicon modules a number of laser processes are used during fabrication in order to obtain a serial connection between adjacent cells. The first of these processes, usually called P1, is used to pattern the front contact to separate electrically the different cells. In this work we study in detail two approaches for defining P1 processes on tin oxide (SnO2:F) using an ns DPSS laser emitting at 355 nm, either irradiating the material from the film side ) or from the substrate side . The effect of scribing parameters such as pulse energy, frequency and pulse overlap has been investigated for both geometries. Grooves obtained by applying either of these irradiation strategies have been extensively analyzed and compared. The morphology of the scribes obtained has been characterized and the electrical isolation obtained between adjacent stripes has been measured. In addition, the ablation efficiency (from the point of view of energy balance) and the material-removal rate (in this case the amount of material ablated per unit time) have been calculated for different repetition frequencies. Based on the results obtained, the advantages and disadvantages of each geometry are discussed. Finally, amorphous-silicon modules at lab scale have been fabricated using P1 scribes with the best properties and efficiencies for both scribing geometries. A final discussion based on the comparison between the measured electrical properties of the finished modules is included.
International
Si
Congress
E-MRS Spring 2012 - Symposium V. Laser materials processing for micro and nano applications
960
Place
Estrasburgo (Francia)
Reviewers
Si
ISBN/ISSN
CDP08UPM
Start Date
14/05/2012
End Date
18/05/2012
From page
1
To page
1
E-MRS Spring 2012 Full Program Symposium V. Laser materials processing for micro and nano applications. Publicación electrónica en la web del congreso http://www.emrs-strasbourg.com/
Participants
  • Autor: D. Canteli (CIEMAT)
  • Autor: I. Torres (CIEMAT)
  • Autor: Juan José García-Ballesteros . (UPM)
  • Autor: J. Cárabe (CIEMAT)
  • Autor: Carlos Luis Molpeceres Alvarez (UPM)
  • Autor: J.J. Gandía (CIEMAT)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Investigación en Ingeniería y Aplicaciones del Láser
  • Centro o Instituto I+D+i: Centro Laser
  • Departamento: Física Aplicada a la Ingeniería Industrial
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)