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.