Influence of laser wavelength on Laser-Fired contacts for crystalline silicon solar cells

Sanchez Aniorte, Maria Isabel; Muñoz Martín, David; Morales Furió, Miguel; Ortega, Pablo; Martín, Isidro; Colina Brito, Mónica; Alcubilla, R. y Molpeceres Álvarez, Carlos Luis (2012). Influence of laser wavelength on Laser-Fired contacts for crystalline silicon solar cells. En: "27th EU PVSEC 2012", 24/09/2012 - 28/09/2012, Frankfurt, Alemania.

Descripción

Título: Influence of laser wavelength on Laser-Fired contacts for crystalline silicon solar cells
Autor/es:
  • Sanchez Aniorte, Maria Isabel
  • Muñoz Martín, David
  • Morales Furió, Miguel
  • Ortega, Pablo
  • Martín, Isidro
  • Colina Brito, Mónica
  • Alcubilla, R.
  • Molpeceres Álvarez, Carlos Luis
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 27th EU PVSEC 2012
Fechas del Evento: 24/09/2012 - 28/09/2012
Lugar del Evento: Frankfurt, Alemania
Título del Libro: Proceedings of 27th EU PVSEC 2012
Fecha: 2012
Materias:
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Física Aplicada a la Ingeniería Industrial [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

In the Laser-Fired Contact (LFC) process, a laser beam fires a metallic layer through a dielectric passivating layer into the silicon wafer to form an electrical contact with the silicon bulk [1]. This laser technique is an interesting alternative for the fabrication of both laboratory and industrial scale high efficiency passivated emitter and rear cell (PERC). One of the principal characteristics of this promising technique is the capability to reduce the recombination losses at the rear surface in crystalline silicon solar cells. Therefore, it is crucial to optimize LFC because this process is one of the most promising concepts to produce rear side point contacts at process speeds compatible with the final industrial application. In that sense, this work investigates the optimization of LFC processing to improve the back contact in silicon solar cells using fully commercial solid state lasers with pulse width in the ns range, thus studying the influence of the wavelength using the three first harmonics (corresponding to wavelengths of 1064 nm, 532 nm and 355 nm). Previous studies of our group focused their attention in other processing parameters as laser fluence, number of pulses, passivating material [2, 3] thickness of the rear metallic contact [4], etc. In addition, the present work completes the parametric optimization by assessing the influence of the laser wavelength on the contact property. In particular we report results on the morphology and electrical behaviour of samples specifically designed to assess the quality of the process. In order to study the influence of the laser wavelength on the contact feature we used as figure of merit the specific contact resistance. In all processes the best results have been obtained using green (532 nm) and UV (355 nm), with excellent values for this magnitude far below 1 mΩcm2.

Más información

ID de Registro: 14104
Identificador DC: http://oa.upm.es/14104/
Identificador OAI: oai:oa.upm.es:14104
URL Oficial: https://www.eupvsec-proceedings.com/proceedings?paper=16374
Depositado por: Memoria Investigacion
Depositado el: 19 Dic 2012 11:15
Ultima Modificación: 21 Ago 2017 12:07
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