Minority carrier traps in Czochralski-grown p-type silicon crystals doped with B, Al, Ga, or in impurity atoms

Joyce Ann T. De Guzman, Vladimir P. Markevich, Simon Hammersley, Ian D. Hawkins, Iain Crowe, Nikolay V. Abrosimov, Robert Falster, Jeff Binns, Pietro Altermatt, Matthew P. Halsall, Anthony R. Peaker

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Minority carrier traps in Czochralski-grown (Cz) silicon crystals doped with either boron, aluminum, gallium, or indium impurity atoms have been investigated by means of deep-level transient spectroscopy and other junction-related techniques. The experimental data have suggested that minority carrier trapping effects in Cz-Si samples doped with different acceptor impurities are associated with complexes incorporating a substitutional group-III impurity atom and two oxygen atoms, which are found to be negative-U defects with close locations of E(-/+) occupancy level at about Eu + 0.32 eV. We have determined the energy barriers and frequency factors for the reversible transformations of the complexes between deep donor and shallow acceptor states. These parameters are discussed in relation to light-induced degradation behavior of solar cells on p-type Cz-Si crystals.

Original languageEnglish
Title of host publication2020 47th IEEE Photovoltaic Specialists Conference, PVSC 2020
PublisherIEEE
Pages1013-1018
Number of pages6
ISBN (Electronic)9781728161150
DOIs
Publication statusPublished - 14 Jun 2020
Event47th IEEE Photovoltaic Specialists Conference, PVSC 2020 - Calgary, Canada
Duration: 15 Jun 202021 Aug 2020

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
Volume2020-June
ISSN (Print)0160-8371

Conference

Conference47th IEEE Photovoltaic Specialists Conference, PVSC 2020
Country/TerritoryCanada
CityCalgary
Period15/06/2021/08/20

Keywords

  • deep-level transient spectroscopy
  • defects
  • minority carriers
  • p-type silicon
  • trapping center

Research Beacons, Institutes and Platforms

  • Photon Science Institute

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