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dc.contributor.authorSharma A.-
dc.contributor.authorSaklani D.-
dc.contributor.authorJustin Thomas, K. R.-
dc.contributor.authorSwayamprabha S.S.-
dc.contributor.authorJou J.-H.-
dc.identifier.citationOrganic Electronics(2020), 86-
dc.description.abstractA series of carbazole based derivatives differing in the number of dicyanovinyl acceptors and donors (N-alkyl carbazole or N-phenyl carbazole) are designed, synthesized and characterized. The effect of donors on optical, electrochemical and thermal properties of carbazole-dicyanovinyl dyads is critically analysed. The dyes containing C3-linked carbazole donor showed red-shifted absorption and larger molar extinction coefficients when compared to the dyes those containing N-phenylcarbazole attributable to the extended conjugation of C3-linked N-butylcarbazole. All the compounds showed positive solvatochromism in fluorescence attributable to intramolecular charge transfer in excited state. The higher thermal stability of the dyes suggests the rigidity of the carbazole derivatives. Interestingly, all the dyes containing N-phenylcarbazole showed aggregation-induced emission properties in THF-H O mixtures attributable to increased distortion in molecular configuration and restricted rotation in the solid state. Furthermore, a green OLED device fabricated with the dye containing N-butyl carbazole donor as dopant emitter (3%) in CBP host achieved good performance with high external quantum efficiency (4.2%), current efficiency (13.1 cd A ) and maximum brightness (L ) of 6180 cd m .-
dc.publisherElsevier B.V.-
dc.relation.ispartofOrganic Electronics-
dc.subjectAggregation-induced emission-
dc.subjectDonor-acceptor compounds-
dc.subjectOrganic fluorescent materials-
dc.subjectOrganic light emitting diodes-
dc.subjectCharge transfer-
dc.subjectExcited states-
dc.subjectGreen manufacturing-
dc.subjectOrganic light emitting diodes (OLED)-
dc.subjectRed Shift-
dc.subjectThermodynamic stability-
dc.subjectAggregation-induced emissions-
dc.subjectDicyanovinyl acceptors-
dc.subjectExternal quantum efficiency-
dc.titleSynthesis and characterization of multi-substituted carbazole derivatives exhibiting aggregation-induced emission for OLED applications-
dc.affiliationSharma, A., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology, Roorkee, 247667, India-
dc.affiliationSaklani, D., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology, Roorkee, 247667, India-
dc.description.fundingScience and Engineering Research Board, SERB: CRG/2018/003729 Bangladesh Council of Scientific and Industrial Research, BCSIR: 02(0371)/19/EMR-II.KRJT is thankful to Science and Engineering Research Board (SERB), New Delhi ( CRG/2018/003729 ) and Council of Scientific and Industrial Research (CSIR), New Delhi ( 02(0371)/19/EMR-II ) for financial support. AS is grateful to University Grant Commissio-
dc.description.correspondingauthorJustin Thomas, K.R.; Organic Materials Laboratory, India; email:
Appears in Collections:Journal Publications [CY]

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