Recombination reduction at the c-Si/RCA oxide interface through Ar-H2 plasma treatment

Kees Landheer, Paula C P Bronsveld, Ioannis Poulios, Frans D. Tichelaar, Monja Kaiser, Ruud E I Schropp*, Jatin K. Rath

*Corresponding author for this work

    Research output: Contribution to journalLetterScientificpeer-review

    1 Citation (Scopus)

    Abstract

    An Ar‑H2 plasma treatment was applied on an ultrathin RCA oxide to create well-passivated silicon wafers with symmetric c‑Si/SiOx:H/a‑Si:H passivation layer stacks. The effective lifetime of these samples increased from 10 μs to 4 ms after annealing at 200 °C through Ar‑H2 plasma treatment of the oxide. The results indicate that the plasma treatment can modify the RCA oxide and this enables atomic hydrogen diffusion at low annealing temperature, leading to a well passivated c‑Si/SiOx:H interface. This might provide new possibilities to use wet chemical oxides in c-Si solar cells, for example as tunnel contacts.

    Original languageEnglish
    Pages (from-to)1226-1230
    Number of pages5
    JournalApplied Surface Science
    Volume396
    DOIs
    Publication statusPublished - 28 Feb 2017

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