Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Interdigitated Laser-Contacted Solar Cell on Liquid-Phase Crystallized Silicon on GLASS
Year:2017
Research Areas
  • Engineering,
  • Mechanical engineering,
  • Electronic devices,
  • Laser devices,
  • Photovoltaic generation
Information
Abstract
10 ?m thick liquid-phase crystallized silicon (Si) layers on 3.2 mm Borofloat 33 glass (5cm x 5cm) are fabricated by continuous wave line focus laser (808 nm). A sputtered SiO2/SiON layer stack has been implemented as barrier layer at the glass Si interface. Solar cells with interdigitated back contact are prepared on these multicrystalline layers by using low temperature (<400oC) Doped-by-Laser (DopLa) fabrication concept. ALDAl2O3/ PECVD amorphous intrinsic Si carbide (SiCx(i)) stack for emitter passivation and a-SiCy(i)/P-doped a- SiCz(n)/a-SiCx(i) stack for base passivation are deposited. With short pulse (ns) UV laser (355 nm) p-type emitter (by Al-diffusion from Al2O3) and point contacts with back surface field (by P-diffusion from a-SiCz(n) layer) are fabricated on n-type mc-Si absorbers layers. Solar cell process steps are monitored by charge carrier lifetime measurements using the quasi steady-state photoconductance method. A strong dependency of charge carrier lifetime on injection level and doping density of absorbers is observed. Higher lifetimes are found for lower absorber doping concentrations. In 0.7 ?cm LPCSG absorber highest eff ? 300 ns corresponding to Leff > 20 ?m is found. Laserdoping and contacting using UV laser resulted in small (< 20 mV) loss of Voc(1sun). Crack formation in LPCSG absorbers after laser crystallization process presents technological problems in the preparation of the interdigitated metal contact.
International
Si
Congress
EU PVSEC 2017 33rd European Photovoltaic Solar Energy Conference and Exhibition
970
Place
Amsterdam (Países Bajos)
Reviewers
Si
ISBN/ISSN
3-936338-47-7
10.4229/EUPVSEC20172017-2CV.2.19
Start Date
25/09/2017
End Date
29/09/2017
From page
827
To page
831
33rd European Photovoltaic Solar Energy Conference and Exhibition. Proceedings of the International Conference
Participants
  • Autor: M. Vetter (Leibniz-Institute of Photonic Technology (IPHT))
  • Autor: G. Lopez (Universitat Politècnica de Catalunya)
  • Autor: P. Ortega (Universitat Politècnica de Catalunya)
  • Autor: I. Martin (Universitat Politècnica de Catalunya)
  • Autor: G. Andra (Leibniz-Institute of Photonic Technology (IPHT))
  • Autor: David Muñoz Martin (UPM)
  • Autor: Carlos Luis Molpeceres Alvarez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Manufactura Avanzada con Láser
  • Departamento: Física Aplicada e Ingeniería de Materiales
  • Centro o Instituto I+D+i: Centro Laser
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)