1,2,4-TRIAZOLE DERIVATIVE AS AN ELECTRON-TRANSPORT LAYER IN ORGANIC ELECTROLUMINESCENT DEVICES

Organic electroluminescent devices with multilayer structures were fab ricated using a 1,2,4-triazole derivative as the carrier transport lay er. yl)-4-phenyl-5-(4-tert-butylphenyl)-1,2,4-triazole (TAZ) was found to be electron-transporting, and a cell with a structure of glass sub strate/indium-tin oxide/triphenylamine derivative (TPD)/TAZ/Alq/Mg:Ag exhibited bright blue electroluminescence from the TPD layer. A lumina nce of 3700 cd/m2 with an emission peak at 464 nm was achieved at a dr ive voltage of 16 V.