Efficiency Improvement of Crystalline Solar Cells: Final Subcontract Report; October 2001--December 2004

Research output: NRELSubcontract Report

Abstract

The approach in this subcontract was to use unique analytical tools available at Berkeley to perform systematic fundamental physical studies of the distribution and chemical state of metal clusters in a variety of multicrystalline silicon materials. Two analytical techniques were essential for the success of this project. The total metal concentration in the areas of multicrystalline silicon withhigh and low lifetime was determined by neutron activation analysis, a technique that involves irradiation of a sample with neutrons in a nuclear reactor and analysis of its residual radioactivity. The distribution and chemical state of metal clusters was characterized by synchrotron radiation-based X-ray microscopes available at the Advanced Light Source (Beamlines 10.3.1 and 10.3.2) atLawrence Berkeley National Laboratory and Advanced Photon Source (Beamlines 2-ID-D and 20-ID-B) at Argonne National Laboratory.
Original languageAmerican English
Number of pages31
StatePublished - 2005

Bibliographical note

Work performed by the University of California at Berkeley, Berkeley, California

NREL Publication Number

  • NREL/SR-520-37578

Keywords

  • float-zone (FZ)
  • in-situ
  • manufacturer
  • metal clusters
  • microprobe x-ray fluorescence (mu-XRF)
  • module
  • multicrystalline silicon
  • PV
  • solar cells
  • synchrotron radiation
  • x-ray absorption microspectroscopy (mu-XAS)
  • x-ray-beam-induced current measurements (XBIC)

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