Memorias de investigación
Communications at congresses:
Characterization of direct- and back-scribing laser patterning of SnO2:F for a-Si:H PV module fabrication.

Research Areas
  • Engineering

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.
E-MRS Spring 2012 - Symposium V. Laser materials processing for micro and nano applications
Estrasburgo (Francia)
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E-MRS Spring 2012 Full Program Symposium V. Laser materials processing for micro and nano applications. Publicación electrónica en la web del congreso
  • 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