Some Considerations On Photocurrent Characteristics Of Poly(alkylthiophene) And Photovoltaic Characteristics Of Poly(alkylthiophene)/ZnO Based Hybrid Solar Cells

Photocurrent characteristics of poly(alkylthiophene) has been investigated in ITO/poly(alkylthiophene)/Au structure by performing the V‐I measurement at various light illumination intensity. The dependence of photocurrent on light intensity was clearly observed in reverse bias condition. The photocurrent characteristics obey a power law dependence on light intensity, which may be related with the electric field dependent charge carrier generation and transport. Photovoltaic characteristics has been investigated in ITO/Al‐doped ZnO/poly(alkylthiophene)/Ag structure. The observed photovoltaic characteristics show the function of this ZnO layer as the acceptor layer. However, the V‐I curve indicates unusual behavior indicating Ohmic‐like characteristic, which is discussed by considering the nano‐morphology and the conductivity properties of the ZnO layer.