A solid state electric device includes templated charge-carrier-transporting channel layer interposed between a pair of conductive substrates. The templated charge-carrier-transporting channel layer includes a layer of a first charge-carrier-transporting material having one or more regions defined using templating techniques, in which a second charge-carrier-transporting material is deposited. The second charge-carrier-transporting material is distributed within the templated charge-carrier-transporting channel layer such that, predominantly, only a single contiguous part of the second charge-carrier-transporting material is interposed between the first conductive substrate and the second conductive substrate along any imaginary normal axis extending between the two conductive substrates.