The use of phenylenevinylene based dendrimers for organic LEDs was investig
ated. We have found when a family of distyrylbenzene centred dendrimers wer
e used as the light-emitting layers in LEDs that the efficiency was depende
nt on the dendrimer generation number. A maximum efficiency of 0.09% was ob
served in an ITO/ second generation dendrimer/Ca device.