Organic EL Devices Having Lewis-Acid-Doped Polymer As a Hole-Injecting Layer

Abstract

We have fabricated organic EL devices having Lewis-acid-doped polymer as a hole-injecting layer. The polymer used is polyarylamine and Lewis acids used are trispentafluorophenylborane and tris b-perfluoronaphthylborane. The EL device with a structure of glass substrate/indium-tin oxide/Lewis-acid-doped polyarylamine/naphthyl phenyl diamine (α-NPD)/tris(8-quinolinolato) aluminum(III) (Alq)/LiF/Al showed higher luminance and luminous efficiencies compared with the device without a hole-injecting layer.