Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Influence of wavelength on laser doping and laser-fired contact processes for c-Si solar cells
Year:2012
Research Areas
  • Engineering
Information
Abstract
This work investigates the influence of the laser wavelength on laser doping (LD) and laser-fired contact (LFC) formation in solar cell structures. We compare the results obtained using the three first harmonics (corresponding to wavelengths of 1064 nm, 532 nm and 355 nm) of fully commercial solid state laser sources with pulse width in the ns range. The discussion is based on the impact on the morphology and electrical characteristics of test structures. In the case of LFC the study includes the influence of different passivation layers and the assessment of the process quality through electrical resistance measurements of an aluminium single LFC point for the different wavelengths. Values for the normalized LFC resistance far below 1.0 m?cm2 have been obtained, with better results at shorter wavelengths. To assess the influence of the laser wavelength on LD we have created n+ regions into p-type c-Si wafers, using a dry LD approach to define punctual emitters. J-V characteristics show exponential trends at mid-injection for a broad parametric window in all wavelengths, with local ideality factors well below 1.5. In both processes the best results have been obtained using green (532 nm) and, specially, UV (355 nm). This indicates that to minimize the thermal damage in the material is a clear requisite to obtain the best electrical performance, thus indicating that UV laser shows better potential to be used in high efficiency solar cells.
International
Si
JCR
No
Title
Laser Material Processing for Solar Energy SPIE Proceedings Vol. 8473
ISBN
9780819491909
Impact factor JCR
Impact info
Volume
10.1117/12.929456
Journal number
From page
847308-1
To page
847308-11
Month
SIN MES
Ranking
Participants
  • Autor: Carlos Luis Molpeceres Alvarez (UPM)
  • Autor: Maria Isabel Sanchez Aniorte (UPM)
  • Autor: Miguel Morales Furio (UPM)
  • Autor: D. Muñoz (UPM)
  • Autor: I. Martín (UPC)
  • Autor: P. Ortega (UPC)
  • Autor: M. Colina (UPC)
  • Autor: C. Voz (UPC)
  • Autor: R. Alcubilla (UPC)
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
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