HETEROINTERFACE PROPERTIES OF NOVEL HYBRID SOLAR CELLS CONSISTING OF TRANSPARENT CONDUCTIVE POLYMERS AND III-NITRIDE SEMICONDUCTOR

We have investigated the heterointerface properties of recently developed hybrid solar cells comprising a Schottky contact made of transparent conductive polymer (TCP) and an underlying GaN semiconductor layer. The heterointerface capacitance induced by the depletion layer under the TCP Schottky contact showed a rapid drop at a specific frequency. An intrinsic capacitance component that was derived from the capacitance-frequency (C-f) characteristics of the heterointerface showed clear correlation with the open circuit voltage. Hence, the C-f characterization using TCP Schottky contacts is indicative of the quality of the heterointerface.