Ion beams can be used in molecular or macromolecular physics to realize Org
anic Light Emitting Diodes (OLEDs). In order to obtain blue light emission,
we have realized light emitting diodes with a conjugated oligomer : the pa
rasexiphenyl (phi(6)). Parasexiphenyl thin film is obtained by Ion Beam Ass
isted Depositon (IBAD). Efficient injection of holes and electrons is provi
ded from an ITO anode and calcium cathode. The electroluminescence spectra
show that the maximum emission wavelength is not modified by IBAD process b
ut we have noticed an increase of the resistivity.