Physical Modelling of Luminescence Spectra from Crystalline Silicon

Daniel MacDonald, Anyao Liu, Hieu Nguyen, Siew Yee Lim, Fiacre Rougieux

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

    Abstract

    We demonstrate that complex luminescence spectra from silicon wafers can be accurately modelled using a simple expression for the individual phonon-related components. By using combinations of various phonon emission and absorption events, it is possible to build up the entire luminescence spectra, which we demonstrate for temperatures between 78 to 300 K. At room temperature, the dominant components of the spectra are caused by emission and absorption of momentum-conserving transverse optical and transverse acoustic phonons. Secondary phonon replicas also involve the emission of non-momentum-conserving inter-valley phonons. The model correctly reproduces the changes in sharpness of the measured spectra as a function of temperature, as well as correctly accounting for the relative change in impact of phonon emission and absorption related luminescence. At low temperatures, additional peaks caused by recombination through neutral dopant atoms are also evident, and can be modelled using the same approach. The model may be useful for understanding luminescence spectra from silicon wafers and solar cells.
    Original languageEnglish
    Title of host publicationProceedings of the European Photovoltaic Solar Energy Conference and Exhibition
    Place of PublicationGermany
    PublisherFraunhofer ISE
    Pages440-443
    EditionPeer Reviewed
    ISBN (Print)3936338396
    DOIs
    Publication statusPublished - 2015
    EventEuropean Photovoltaic Solar Energy Conference and Exhibition EU PVSEC 2015 - Hamburg, Germany, Germany
    Duration: 1 Jan 2015 → …
    http://publica.fraunhofer.de/ise/2015-conference.htm

    Conference

    ConferenceEuropean Photovoltaic Solar Energy Conference and Exhibition EU PVSEC 2015
    Country/TerritoryGermany
    Period1/01/15 → …
    OtherSeptember 14-18 2015
    Internet address

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