6533b839fe1ef96bd12a6313
RESEARCH PRODUCT
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subject
Materials scienceCarbazoleOrganic ChemistryPharmaceutical Science02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnologyPhotochemistryTriphenylamine01 natural sciences0104 chemical sciencesAnalytical Chemistrychemistry.chemical_compoundchemistryChemistry (miscellaneous)Intramolecular forceDendrimerDrug DiscoveryOLEDMolecular MedicineMoleculePyrenePhysical and Theoretical Chemistry0210 nano-technologyCommon emitterdescription
Two light-emitting polyphenylene dendrimers with both hole and electron transporting moieties were synthesized and characterized. Both molecules exhibited pure blue emission solely from the pyrene core and efficient surface-to-core energy transfers when characterized in a nonpolar environment. In particular, the carbazole- and oxadiazole-functionalized dendrimer (D1) manifested a pure blue emission from the pyrene core without showing intramolecular charge transfer (ICT) in environments with increasing polarity. On the other hand, the triphenylamine- and oxadiazole-functionalized one (D2) displayed notable ICT with dual emission from both the core and an ICT state in highly polar solvents. D1, in a three-layer organic light emitting diode (OLED) by solution processing gave a pure blue emission with Commission Internationale de l’Eclairage 1931 CIE xy = (0.16, 0.12), a peak current efficiency of 0.21 cd/A and a peak luminance of 2700 cd/m2. This represents the first reported pure blue dendrimer emitter with bipolar charge transport and surface-to-core energy transfer in OLEDs.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-10-20 | Molecules |