A double layer of dianthratetrathiafulvalene (DATTF) and fullerene (C60) on an n++-Si wafer pretreated with n-octyltrichlorosilane exhibited a high electrical conductivity of σ= 0.12 S/cm and was used as source–drain electrodes in organic field effect transistors (OFETs). A simplified OFET device architecture composed of an organic semiconducting active layer and an organic electrode layer was easily fabricated by successive vacuum deposition of organic donor and acceptor layers. It was confirmed that this device configuration is applicable for both p- and n-type FET operation.

We developed new oxidative electrochromic materials based on triarylamines and benzidine. These were coated onto substrates and cured by UV irradiation to obtain polymer films. These materials emitted yellow, magenta and cyan colored light. In color devices using these materials, high transmittances of the uncolored states and high optical densities of the colored states were shown to be compatible. We demonstrated that CMYK and RGB can be expressed by mixing these materials. We also succeeded in prototyping EC decorative glass by combining these materials and using inkjet printing; this represents a new application for oxidative EC materials.

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