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dc.contributor.authorJung, Hyocheol-
dc.contributor.authorNguyen, Tai-
dc.contributor.authorKim, Soyeon-
dc.contributor.authorLee, Jae Woong-
dc.contributor.authorYu, Hyeonggeun-
dc.contributor.authorPark, Junsung-
dc.contributor.authorLim, Chanwoo-
dc.contributor.authorLee, Jihoon-
dc.contributor.authorKim, Do Young-
dc.date.accessioned2024-07-04T06:00:25Z-
dc.date.available2024-07-04T06:00:25Z-
dc.date.created2024-07-04-
dc.date.issued2024-10-
dc.identifier.issn1616-301X-
dc.identifier.urihttps://pubs.kist.re.kr/handle/201004/150174-
dc.description.abstractUltraviolet (UV), visible, and near-infrared (NIR) broadband organic photodetectors are fabricated by sequential solution-based thin film coatings of a polymer electron blocking layer (EBL) and a polymer photoactive layer. To avoid damage to a preceding polymer EBL during a subsequent solution-based film coating of a polymer photoactive layer due to lack of solvent orthogonality, 2-(((4-azido-2,3,5,6-tetrafluorobenzoyl)oxy)methyl)-2-ethylpropane-1,3-diyl bis(4-azido-2,3,5,6-tetrafluorobenzoate) (FPA-3F) is used as a novel organic cross-linking agent activated by UV irradiation with a wavelength of 254 nm. Solution-processed poly[N,N '-bis(4-butylphenyl)-N,N '-bis(phenyl)-benzidine] (poly-TPD) films, which are cross-linked with a FPA-3F photocrosslinker, are used for a preceding polymer EBL. A ternary blend film composed of PTB7-Th, COi8DFIC, and PC71BM is used as a NIR-sensitive organic photoactive layer with strong photosensitivity in multispectral (UV-visible-NIR) wavelengths of 300-1,050 nm. Poly-TPD films are successfully cross-linked even with a very small amount of 1 wt% FPA-3F. Small amounts of FPA-3F have little detrimental effect on the electrical and optoelectronic properties of the cross-linked poly-TPD EBL. Finally, organic NIR photodetectors with a poly-TPD EBL cross-linked by the small addition of FPA-3F (1 wt%) show the detectivity values higher than 1 x 1012 Jones for the entire UV-visible-NIR wavelengths from 300 nm to 1050 nm, and the maximum detectivity values of 1.41 x 1013 Jones and 8.90 x 1012 Jones at the NIR wavelengths of 900 and 1000 nm, respectively. An organic NIR photodetector is successfully fabricated using a cross-linked poly[N,N '-bis(4-butylphenyl)-N,N '-bis(phenyl)-benzidine] electron blocking layer (poly-TPD EBL) assisted by a novel organic photocrosslinker. The organic photodetector with crosslinked EBL shows a low dark current and shows detectivity values higher than 1 x 1012 Jones for the entire UV-visible-NIR wavelengths from 300 nm to 1050 nm. image-
dc.languageEnglish-
dc.publisherJohn Wiley & Sons Ltd.-
dc.titleHigh-Detectivity UV-Visible-NIR Broadband Polymer Photodetector with Polymer Charge Blocking Layer Cross-Linked by Organic Photocrosslinker-
dc.typeArticle-
dc.identifier.doi10.1002/adfm.202403094-
dc.description.journalClass1-
dc.identifier.bibliographicCitationAdvanced Functional Materials, v.34, no.41-
dc.citation.titleAdvanced Functional Materials-
dc.citation.volume34-
dc.citation.number41-
dc.description.isOpenAccessN-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.identifier.scopusid2-s2.0-85196664339-
dc.relation.journalWebOfScienceCategoryChemistry, Multidisciplinary-
dc.relation.journalWebOfScienceCategoryChemistry, Physical-
dc.relation.journalWebOfScienceCategoryNanoscience & Nanotechnology-
dc.relation.journalWebOfScienceCategoryMaterials Science, Multidisciplinary-
dc.relation.journalWebOfScienceCategoryPhysics, Applied-
dc.relation.journalWebOfScienceCategoryPhysics, Condensed Matter-
dc.relation.journalResearchAreaChemistry-
dc.relation.journalResearchAreaScience & Technology - Other Topics-
dc.relation.journalResearchAreaMaterials Science-
dc.relation.journalResearchAreaPhysics-
dc.type.docTypeArticle; Early Access-
dc.subject.keywordPlusLIGHT-EMITTING-DIODES-
dc.subject.keywordPlusDARK CURRENT-
dc.subject.keywordPlusQUANTUM DOTS-
dc.subject.keywordPlusPERFORMANCE-
dc.subject.keywordPlusMONODISPERSE-
dc.subject.keywordPlusEFFICIENCY-
dc.subject.keywordPlusACCEPTOR-
dc.subject.keywordPlusLINKING-
dc.subject.keywordAuthorcross-linking-
dc.subject.keywordAuthordetectivity-
dc.subject.keywordAuthorelectron blocking layer-
dc.subject.keywordAuthornear-infrared-
dc.subject.keywordAuthororganic photodetector-
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