Organic Semiconductor

Organic semiconductor devices are attracting much attention as a practical candidate to meet such requirements because of their simple and low-cost production processes, low environmental burden, as well as for their unique function of flexibility. The scope of our research group ranges from basic scientific studies on materials chemistry to its opto-electronic device applications.

Our recent topics are as follows:

Efficient organic photodiode

We demonstrated a range of selective wavelength region from visible (blue, green and red color wavelength region) up to NIR wavelength by using optical filter embedded in organic PD (OPD) structure which the wavelength selection does not depend on either the organic semiconductor materials or separate/external optical filters.

New fabrication process for stable photoactive layer

We demonstrated a sequential deposition of conjugated polymer and organic small molecule acceptor to form stable bulk heterojunciton

Coloring solar cells

The demand for colorful BIPV is particularly strong for buildings with a decorative exterior, combining an attractive appearance with the ability to generate power.

1. We demonstrated vividly colored semi-transparent organic solar cells

2. We first demonstrated a room temperature solution processable and non-destructive DBR (sDBR) to realize vivid colored CIGS solar cells