Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Effect of the Passivating a-Si:H Layer on Laser-Fired Contacts in p-CZ Silicon-Heterojunction Solar Cells
Year:2013
Research Areas
  • Physics chemical and mathematical,
  • Engineering,
  • Mechanical aeronautics and naval engineering
Information
Abstract
A significant improvement of silicon solar cells can be achieved when an effective back contact is used. In this work, laser-fired contacts (LFC) have been analysed as low-temperature back contacts for rearpassivated silicon-heterojunction solar cells. Layers of intrinsic hydrogenated amorphous silicon, (i)a-Si:H, deposited by plasma-enhanced chemical-vapour deposition (PECVD) have been used as dielectrics in order to passivate the back surface of p-CZ (Czochralski) polished monocrystalline silicon wafers. The quality of these (i)a-Si:H layers has been evaluated as a function of their PECVD deposition parameters and their thicknesses (from 100 to 250 nm). Then an aluminium (Al) back contact has been thermally evaporated. A ns-pulsed Nd:YVO4 laser beam, ?=532 nm, has been used to fire the Al through the (i)a-Si:H layer to create the rear-point LFC back contacts. To obtain low-ohmicresistance back contacts, the irradiation parameters have been adjusted for each (i)a-Si:H thickness. Finally, silicon heterojunction solar cells (SHJ) with laser-fired back contacts with different contacted area have been evaluated. Annealing treatments have been needed to improve the devices.
International
Si
Congress
28th European Photovoltaic Solar Energy Conference and Exhibition
960
Place
París. Francia
Reviewers
Si
ISBN/ISSN
3-936-338-33-7
Start Date
30/09/2013
End Date
04/10/2013
From page
2024
To page
2028
Proc. PVSEC 2013
Participants
  • Autor: R. Barrio (CIEMAT)
  • Autor: N. GONZÁLEZ (CIEMAT)
  • Autor: A. Casado (CIEMAT)
  • Autor: S. Fernández (CIEMAT)
  • Autor: J.P. González (CIEMAT)
  • Autor: David Muñoz Martin (UPM)
  • Autor: Carlos Luis Molpeceres Alvarez (UPM)
  • Autor: J.J. Gandía (CIEMAT)
  • Autor: J. Cárabe (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)
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