Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 66: Focus Session (CPP with HL): Hybrid photovoltaics and perovskites I

HL 66.4: Vortrag

Donnerstag, 19. März 2015, 10:30–10:45, C 130

Junction formation and current transport mechanisms in hybrid n-Si/PEDOT:PSS solar cells — •Sara Jäckle¹, Matthias Mattiza², Manuela Göbelt¹, and Silke Christiansen^{1, 2} — ¹Max-Planck-Institute for the Science of Light, Erlangen, Germany — ²Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany

Hybrid photovoltaics combining a transparent highly conductive polymer and an absorbing inorganic semiconductor promise efficient charge carrier separation and transport. We present solar cells with the 'metal'-like wide-gap polymer PEDOT:PSS and n-doped silicon archiving an open-circuit voltages up to 640mV and a power conversion efficiencies of 12%. The hybrid charge separating interface is commonly treated as a majority carrier dominated Schottky junction. Capacity- and current-voltage characteristics proof by investigating n-Si/PEDOT:PSS solar cells with varying silicon substrate doping concentrations that an inversion layer is created on the silicon surface and the charge transport is dominated by minority carriers. We will present a hybrid junction schematic explaining the promising solar cell characteristics. Furthermore possible degradation mechanisms of these hybrid solar cells under ambient conditions and the effect of encapsulation with low temperature deposited metal oxides will be discussed.