Architectural Evolution of Organic Photodiode using Etalon-Electrode to Realize Color Filter Free Image Sensor
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초록
내용
We demonstrated color filter-free, full color, and thin-film organic photodiodes (OPDs) and their image sensor arrays by employing a novel electrode structure, “etalon-electrode”, which has functions of electrode and wavelength selective window simultaneously. In other words, we have developed a novel R/G/B organic image sensor pixel of a new diode architecture that combines a dual functional thin-film etalon-electrode and a thin-film panchromatic organic photodiode, to realize color filter-free, narrowband full color-detection as well as high detectivity (D*＞1012 Jones). Furthermore, since this new “etalon-electrode” strategy enables facile patterning of R/G/B pixel arrays simply by adjusting the thickness of etalon structure, we could demonstrate a color image capturing ability of organic image sensor without color filters. We believe that this technique can be a breakthrough for realization of ITO-free, color filter-free, thin film and color selective OPD.