Vibrational study of tris-(8-hydroxyquinoline) aluminum/LiF/Al interfaces

He, P.; Wang, S. D.; Lee, S. T.; Hung, L. S.
May 2003
Applied Physics Letters;5/12/2003, Vol. 82 Issue 19, p3218
Academic Journal
Interface studies of tris-(8-hydroxyquinoline) aluminum (Alq[SUB3])/LiF/Al were carried out with high-resolution electron-energy-loss spectroscopy. With LiF on Alq[SUB3] or Al on LiF, no significant changes in intensity were observed for the loss peak related to the Li-F stretch mode. However, the deposition of less than one monolayer of Al on Alq[SUB3]/LiF resulted in a strong attenuation of the LiF-loss peak, providing a direct evidence of LiF dissociation in the coexistence of Alq[SUB3] and Al with LiF. On the other hand, the LiF-loss peak remained almost unchanged when Al was deposited on poly (9,9-dioctyl-fluorene)/LiF.


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