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dc.contributor.author Choi, Changwon -
dc.contributor.author Jeon, Woojin -
dc.contributor.author Lansac, Yves -
dc.contributor.author Jang, Yun Hee -
dc.date.accessioned 2022-09-06T07:30:07Z -
dc.date.available 2022-09-06T07:30:07Z -
dc.date.created 2022-08-08 -
dc.date.issued 2022-07 -
dc.identifier.issn 1932-7447 -
dc.identifier.uri http://hdl.handle.net/20.500.11750/16853 -
dc.description.abstract Full-color image sensors for retinal prosthesis and artificial vision would require organic RGB-color-selective photo diode components. The most challenging components are those for red-selective absorption. Molecular dyes such as phthalocyanine and squaraine require vacuum deposition, and red-light absorption achieved by solution-processed push-pull copolymers is often accompanied by higher-energy absorption in green and blue regions. Push-pull copolymers designed to suppress such highenergy absorption show their low-energy absorption in the IR region rather than in the red region. Herein, we define red selectivity (RS) of a polymer as the ratio of its red-region absorption (the area under the absorption spectrum between 625 and 800 nm) to its total absorption in the visible and near-IR regions (the area between 400 and 1000 nm) and propose a narrow-wide (rather than push-pull) design rule for RS-enhancing copolymers, (1) highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) localized in the narrow-band-gap unit and HOMO-1 and LUMO+1 localized in the other wide-band-gap unit and (2) hybridization between the two units minimized by introducing a twist in the backbone. Doping them with red-selective nonfullerene acceptors would enhance charge transport and sensitivity without sacrificing RS. Such polymers tuned for strong absorption of skin-penetrating red light would be also useful for spatially controlled wireless (noninvasive) power supply to photovoltaic-coupled organic (conformable/ biocompatible) electronic implant. © 2022 American Chemical Society. All rights reserved. -
dc.language English -
dc.publisher American Chemical Society -
dc.title Narrow-Wide Copolymer for Strong Red-Color-Selective Absorption -
dc.type Article -
dc.identifier.doi 10.1021/acs.jpcc.2c02945 -
dc.identifier.scopusid 2-s2.0-85136214663 -
dc.identifier.bibliographicCitation Journal of Physical Chemistry C, v.126, no.29, pp.12230 - 12237 -
dc.description.isOpenAccess FALSE -
dc.subject.keywordPlus PHOTODIODES -
dc.subject.keywordPlus POLYMERS -
dc.subject.keywordPlus VISION -
dc.citation.endPage 12237 -
dc.citation.number 29 -
dc.citation.startPage 12230 -
dc.citation.title Journal of Physical Chemistry C -
dc.citation.volume 126 -
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Department of Energy Science and Engineering CMMM Lab(Curious Minds Molecular Modeling Laboratory) 1. Journal Articles

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