The effect of C60 doped interlayer for lifetime improvement of phosphorescent light emitting diodes

The effect of C60 doped interlayer between poly(3,4-ethylenedioxythiophene:poly(styrenesulfonate) (PEDOT) and light emitting layer on the lifetime of phosphorescent organic light emitting diodes was investigated by changing the C60 content from 0% to 3%. Doping of C60 in 1,3,5-tris(N,N-bis-(4,5-methoxyphenyl)-aminophenyl)benzol (TDAPB) resulted in the increase of lifetime by more than 100% compared with lifetime of non-doped devices.