Improvement of interface formation between metal electrode and polymer film by polymer surface modification using ion sputtering

Liao, L. S.; Liao, L.S.; Fung, M. K.; Fung, M.K.; Cheng, L. F.; Cheng, L.F.; Lee, C. S.; Lee, C.S.; Lee, S. T.; Lee, S.T.; Inbasekaran, M.; Woo, E. P.; Woo, E.P.; Wu, W. W.; Wu, W.W.
November 2000
Applied Physics Letters;11/13/2000, Vol. 77 Issue 20
Academic Journal
The surface of poly (9,9-dioctylfluorene) (PFO) film was modified by 1.0 keV Ar[sup +] irradiation with a dose of 6.5x10[sup 14] ions/cm[sup 2] 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[sup +] 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.


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