We have developed a technology for a new full-color reflective electrochromic display (ECD) based on the subtractive color mixing model. This improves display brightness and color reproducibility. Additional advantage is simple production process. An active matrix driving of the full-color reflective ECD has been demonstrated successfully.

No abstract

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.

No abstract

We demonstrate a novel module for series-connected solid-state dye-sensitized solar cells with a non-divided active layer, comprising a compact TiO2 layer, sensitized dye coated on a nano-porous TiO2 layer, and a hole-transporting layer. This module was achieved by only dividing the transparent conductive electrode and the counter electrode. The photovoltaic performance of this non-divided module is comparable to that of the divided module. Moreover, this non-divided module exhibited good shielding performance compared with the amorphous-Si solar cell.