Počet záznamů: 1  

Thin film polycrystalline Si solar cells studied in transient regime by optical pump-terahertz probe spectroscopy

  1. 1.
    0455242 - FZU-D 2016 RIV US eng J - Článek v odborném periodiku
    Pikna, Peter - Skoromets, Volodymyr - Becker, C. - Fejfar, Antonín - Kužel, Petr
    Thin film polycrystalline Si solar cells studied in transient regime by optical pump-terahertz probe spectroscopy.
    Applied Physics Letters. Roč. 107, č. 23 (2015), "233901-1"-"233901-5". ISSN 0003-6951
    Grant CEP: GA ČR GA13-12386S
    Grant ostatní:AVČR(CZ) M100101216
    Institucionální podpora: RVO:68378271
    Klíčová slova: thin film polycrystalline silicon * terahertz spectroscopy * passivation * Suns-Voc method * defects
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 3.142, rok: 2015

    We used time-resolved terahertz spectroscopy to study ultrafast photoconductivity of polycrystalline thin-film silicon solar cells. We selected a series of samples, which exhibited variable conversion efficiencies due to hydrogen plasma passivation under various technological conditions. The decay of the transient terahertz conductivity shows two components: the fast one is related to the charge recombination at interfaces, while the slow nanosecond one is attributed to the trapping of photocarriers by defects localized at grain boundaries or at dislocations in the polycrystalline p- layer of the structure. We observed a clear correlation between the open-circuit voltage and the nanosecond-scale decay time of the transient terahertz conductivity of the solar cells. Thus, the terahertz spectroscopy appears to be a useful contactless tool for inspecting the local photoconductivity of solar cells including, in particular, various nanostructured schemes.
    Trvalý link: http://hdl.handle.net/11104/0255884