Improved Back Contact Barrier of CZTSe solar cells by incorporating nanoscale Ge bi-layers

Sanghyun Lee, Kent J. Price, Edgardo Saucedo, Sergio Giraldo

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

    2 Scopus citations

    Abstract

    The presence of Schottky barrier near back contact limits the hole movement which influences the current-voltage characteristics and deteriorates the Voc-deficit as well. In this work, a set of CZTSe solar cells were fabricated by DC magnetron sputtering and investigated for the back contact interface between CZTSe/MoSe2 and Mo metal contact in an effort to improve a back contact barrier. By incorporating nanoscale Ge bi-layers below and below the absorber, a barrier height is considerably improved. To extract a back contact barrier height, a temperature-dependent behavior of CZTSe: Ge bi-layer devices is characterized and compared to CZTSe monolayer devices.

    Original languageEnglish
    Title of host publication2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC
    Pages3712-3714
    Number of pages3
    ISBN (Electronic)9781538685297
    DOIs
    StatePublished - Nov 26 2018
    Event7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - Waikoloa Village, United States
    Duration: Jun 10 2018Jun 15 2018

    Publication series

    Name2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC

    Conference

    Conference7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018
    Country/TerritoryUnited States
    CityWaikoloa Village
    Period6/10/186/15/18

    Bibliographical note

    Funding Information:
    Authors acknowledges the generous support by the Louisville Gas & Energy and Kentucky Utility Foundation.

    Publisher Copyright:
    © 2018 IEEE.

    Keywords

    • Back contact
    • cZTSe
    • kesterite
    • schottky barrier

    ASJC Scopus subject areas

    • Energy Engineering and Power Technology
    • Renewable Energy, Sustainability and the Environment
    • Electrical and Electronic Engineering
    • Electronic, Optical and Magnetic Materials

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