ACS Applied Materials & Interfaces · 2010 · 76 citations · 14 references
Natural SciencesChemistryPhysicsElectronic MaterialsMolecular PhysicsOrganic ChemistryFluorescence SpectroscopyLight-emitting DiodesLuminescent MaterialsOrganic Electronic MaterialsOrganic SemiconductorsPhotochemistryAggregationCharge TrappingElectroluminescenceEnergy TransferFull Width At Half MaximumMolecular AggregationOrganic Light-emitting DiodesSmall-molecule Organic Semiconductors
A fluorinated phenoxy boron subphthalocyanine (BsubPc) is shown to function as a fluorescent dopant emitter in small molecule organic light emitting diodes (OLEDs). Narrow electroluminescence (EL) emission with a full width at half-maximum of ∼30 nm was observed regardless of the host used, indicating that this narrow EL is intrinsic to the BsubPc molecule. A bathochromic shift and the growth of a new EL peak at higher wavelengths with increasing doping concentration were found to be a result of molecular aggregation. Excitation of BsubPc by direct charge trapping as well as Förster resonant energy transfer were shown using different host molecules. A maximum efficiency of 1.5 cd/A was achieved for a 4,4'-N,N'-dicarbazole-biphenyl (CBP) host.
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Organic electroluminescent diodes
Chak Wah Tang, S. A. VanSlyke · Applied Physics Letters · 1987 · 14.3K citations
Natural Sciences, Materials Engineering, Materials Science +17