Author/Authors :
Morgado، نويسنده , , J. and Grüner، نويسنده , , Christopher J. and Walcott، نويسنده , , S.P. and Yong، نويسنده , , T.M. and Cervini، نويسنده , , Lyall R. and Moratti، نويسنده , , S.C and Holmes، نويسنده , , A.B. and Friend، نويسنده , , R.H.، نويسنده ,
Abstract :
We report investigations on a 4-acetamido-substituted naphthalimide polymer (4-AcNI) as a component for light-emitting diodes (LEDs). Devices prepared with 4-AcNI as the active material are relatively inefficient (4 × 10−4%). Higher internal quantum efficiency values of 0.4% are achieved if 4-AcNI is used as an electron-transporting layer (ETL) in devices which use poly(p-phenylene vinylene) (PPV) as a hole transport layer. For Al cathodes, this material proves to be superior to similar devices which use 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD) as the ETL. The results are used to shed some light on the function of ETLs in organic LEDs.
Keywords :
4-Acetamido-substituted naphthalimide , Electron-transport material , Poly(p-phenylene vinylene) , electroluminescence , light-emitting diodes
