Temperature dependence of polysilicon passivating contact and its device performance

Anh Huy Tuan Le, Rabin Basnet, Di Yan, Wenhao Chen, Johannes P. Seif, Ziv Hameiri

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

    4 Citations (Scopus)


    The temperature coefficient (TC) of solar cells is an important figure of merit for any photovoltaic technology. Recently, tunnel oxide passivated contact (TOPCon) solar cells have attracted significant attention due to their potential to obtain high efficiency. Quantification of their TC is therefore of significant interest. In this study, we investigate (a) TCs of the TOPCon solar cells, and (b) the temperature dependence of polysilicon passivating contacts. For TOPCon cells using Czochralski-wafers, the relative TC of the cell efficiency is -0.285±0.005 %/°C. To our best knowledge, this is the first time that the efficiency TC of TOPCon cells is reported. This TC value is superior to those of devices without passivating contacts and is comparable to the one of silicon heterojunction cells. Using test samples, we observe an increase of the effective lifetime over the entire measured injection level range and a small improvement of the surface passivation quality when increasing the temperature. However, it seems these effects do not have a strong impact on the TC of the open-circuit voltage. We find that the improvement of the contact resistivity at elevated temperatures offsets some of the fill factor reduction and hence, improves the TC of the fill factor.

    Original languageEnglish
    Title of host publication2020 47th IEEE Photovoltaic Specialists Conference, PVSC 2020
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Number of pages4
    ISBN (Electronic)9781728161150
    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
    ISSN (Print)0160-8371


    Conference47th IEEE Photovoltaic Specialists Conference, PVSC 2020


    Dive into the research topics of 'Temperature dependence of polysilicon passivating contact and its device performance'. Together they form a unique fingerprint.

    Cite this