Investigation of Al back contacts and BSF formation by in situ TEM for silicon solar cells

Sungeun Park, Jooyoung Song, Sung Ju Tark, Young Do Kim, Chel Jong Choi, Soonwoo Kwon, Sewang Yoon, Chang Sik Son, Donghwan Kim

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Back contacts for Si solar cells made by Al evaporation and screen printing Al paste were studied by transmission electron microscopy. Si was found to diffuse into the Al during heating. Si diffusion formed vacancies in the Si wafer and Al could then penetrate the Si wafer in spiked formations. The Al spikes retracted during cooling, leaving a doped back surface field region.

    Original languageEnglish
    Pages (from-to)863-869
    Number of pages7
    JournalProgress in Photovoltaics: Research and Applications
    Volume22
    Issue number8
    DOIs
    Publication statusPublished - 2014 Aug

    Keywords

    • Al back contact
    • BSF mechanism
    • in situ TEM
    • metallization
    • screen printing

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Electrical and Electronic Engineering
    • Renewable Energy, Sustainability and the Environment

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