Triphenyldiamine Derivative Research Articles

Bright red light-emitting organic electroluminescent devices having a europium complex as an emitter

Organic electroluminescent (EL) devices with a trivalent europium (Eu) complex as an emitter were fabricated. Triple-layer-type cells with a structure of glass substrate/indium-tin oxide/ triphenyldiamine derivative (TPD)/Eu complex: 1,3,4-oxadiazole derivative (PBD)/aluminum complex (Alq)/Mg:Ag exhibit bright red luminescence upon applying dc voltage. The EL spectrum consists of extremely sharp emission bands, which is a typical luminescence spectrum of the Eu complex. Luminance of 460 cd/m2 with an emission peak at 614 nm is achieved at a drive voltage of 16 V. This is the highest luminance so far obtained for the EL cells having a Eu complex as an emitter.

Molecularly Doped Polymers for Organic Electroluminescent Devices

Abstract Electroluminescent devices were fabricated using poly(methyl methacrylate) (PMMA) molecularly doped with triphenyldiamine derivative and tris(8-quinolinolato)aluminum(III) complex (Alq). A cell structure of glass substrate/indium-tin-oxide/doped PMMA/Mg: Ag was employed. Green emission with luminance of 920 cd/m2 was achieved at a drive voltage of 17 V. The EL color was tuned to blue-green and yellow-orange by further doping the PMMA layer with suitable organic dyes.

Organic electroluminescent devices based on molecularly doped polymers

Electroluminescent devices were fabricated using poly(methyl methacrylate) (PMMA) molecularly doped with triphenyldiamine derivative and tris(8-quinolinolato)aluminum(III) complex (Alq). A cell structure of glass substrate/indium–tin–oxide/doped PMMA/Mg:Ag was employed. Carrier injection from the electrodes to the doped PMMA layer through the dopants and concomitant electroluminescence from Alq were observed. Green emission with luminance of 920 cd/m2 was achieved at a drive voltage of 17 V.