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dc.contributor.authorLee, G. H.
dc.contributor.authorBulliard, X.
dc.contributor.authorYun, S.
dc.contributor.authorLeem, D. S.
dc.contributor.authorPark, K. B.
dc.contributor.authorLee, K. H.
dc.contributor.authoret al.
dc.identifier.citationOptics Express, vol. 27 (18), pp. 25410-25419, Sep 2019.
dc.description.abstractIn this work, organic photodiodes (OPDs) based on two newly synthesized p-type dipolar small molecules are reported for application to green-light-selective OPDs. In order to reduce the blue-color absorption induced by the use of C60 as the n-type material in a bulk heterojunction (BHJ), the electron donor:electron acceptor composition ratio is tuned in the BHJ. With this light manipulation approach, the blue-wavelength external quantum efficiency (EQE) is minimized to 18% after reducing the C60 concentration in the center part of the BHJ. The two p-type molecules get a cyanine-like character with intense and sharp absorption in the green color by adjusting the strength of their donating and accepting parts and by choosing a selenophene unit as a pi-linker. When combined to C60, the green-wavelength EQE reaches 70% in a complete device composed of two transparent electrodes. Finally, the optical simulation shows the good color-balance performance of hybrid full-color image sensor without an additional filter by using the developed green OPD as the top-layer in stacked device architecture. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
dc.subjectphotodetectors, Optics
dc.titleGreen-light-selective organic photodiodes for full-color imaging
dc.typeJournal Article

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