Exciplex formation at the organic solid-state interface: Yellow emission in organic light-emitting diodes using green-fluorescent tris(8-quinolinolato)aluminum and hole-transporting molecular materials with low ionization potentials
- 9 February 1998
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 72 (6) , 636-638
- https://doi.org/10.1063/1.120826
Abstract
The bilayer organic light-emitting diodes using green-fluorescent tris(8-quinolinolato)aluminum (Alq3) as an emitting material and hole-transport materials with low ionization potentials, 1,3,5-tris(3-methylphenylphenylamino)triphenylamine and 4,4′,4″-tris[bis(4-tert-buthylbiphenyl4-yl)amino]triphenylamine, emitted bright yellow light instead of green light. The yellow emission is attributed to exciplex formation at the solid interface between Alq3 and the hole-transport material. The exciplex formation was evidenced by the measurement of the photoluminescence spectra and lifetimes of the mixture of an equimolar amount of Alq3 and each of the hole-transport materials. The emission color can be tuned by varying the applied voltage.Keywords
This publication has 13 references indexed in Scilit:
- Starburst molecules based on π-electron systems as materials for organic electroluminescent devicesJournal of Luminescence, 1997
- Electroluminescence of 1,3,4-Oxadiazole and Triphenylamine-Containing Molecules as an Emitter in Organic Multilayer Light Emitting DiodesChemistry of Materials, 1997
- Exciplex emission in bilayer polymer light-emitting devicesApplied Physics Letters, 1997
- Organic electroluminescent devices with improved stabilityApplied Physics Letters, 1996
- Organic Electroluminescent Devices Using Novel Starburst Molecules, 1,3,5-Tris[4-(3-Methylphenyl-Phenylamino)Phenyl]Benzene And 4,4′,4″-Tris(3-Methyl-Phenylphenylamino)Triphenylamine, as Hole-Transport MaterialsMolecular Crystals and Liquid Crystals, 1996
- Thermally stable multilared organic electroluminescent devices using novel starburst molecules, 4,4′,4″‐Tri(N‐carbazolyl)triphenylamine (TCTA) and 4,4′,4″‐Tris(3‐methylphenylphenylamino)triphenylamine (m‐MTDATA), as hole‐transport materialsAdvanced Materials, 1994
- Multilayered organic electroluminescent device using a novel starburst molecule, 4,4′,4″-tris(3-methylphenylphenylamino)triphenylamine, as a hole transport materialApplied Physics Letters, 1994
- Organic Electroluminescent Devices with 8-Hydroxyquinoline Derivative-Metal Complexes as an EmitterJapanese Journal of Applied Physics, 1993
- Starburst Molecules for Amorphous Molecular Materials. 4,4′,4″-Tris(N,N-diphenylamino)triphenylamine and 4,4′,4″-Tris[N-(3-methylphenyl)-N-phenylamino]triphenylamineChemistry Letters, 1989
- Organic electroluminescent diodesApplied Physics Letters, 1987