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For the purpose of exploring near-infrared emission, the photoluminescence (PL) and electro- luminescence (EL) of N,N′-bis(neopentyl)-3,4:9,10-perylenebis(dicarboximide) (BNPTCD): tris(8-quinolinolato)aluminum (Alq3) mixed films were investigated. It was found that BNPTCD:Alq3 mixed films exhibit PL in the near-infrared wavelength region and that organic light-emitting diodes using Alq3 highly doped with BNPTCD as an emitting layer exhibit near-infrared EL with a peak at 805 nm originating from BNPTCD aggregates. [ABSTRACT FROM AUTHOR]

Examines the spectral narrowing and emission energy shift in organic electroluminescent (EL) diode utilizing 8-hydroxyquinoline aluminum or aromatic diamine multilayer structure. Components of the organic EL diode; Mechanism of spectral narrowing and the emission energy; Results of the confined carriers in the multilayer system.