Abstract
The surface of poly (9,9-dioctylfluorene) (PFO) film was modified by 1.0 keV Ar+ irradiation with a dose of 6.5 × 1014ions/cm2 prior to Ca deposition. Ultraviolet and x-ray photoelectron spectroscopic studies indicated that the modified surface could effectively block Ca diffusion into the PFO film and prevent the formation of doping-induced bipolaron states in the former forbidden energy gap. As a result, a sharper metal contact on the surface of the PFO film could be formed, compared to that on the surface without Ar+ irradiation. The results suggest that the judicial surface modification of polymer surfaces may be useful for the improvement of metal/polymer contacts and thus device performance. © 2000 American Institute of Physics.
Original language | English |
---|---|
Pages (from-to) | 3191-3193 |
Journal | Applied Physics Letters |
Volume | 77 |
Issue number | 20 |
DOIs | |
Publication status | Published - 13 Nov 2000 |