AVS 53rd International Symposium
    Electronic Materials and Processing Thursday Sessions
       Session EM-ThP

Paper EM-ThP51
Chemical Structure of the Bilayer Ag/Li@sub 2@O Cathode Interface in Organic Light-Emitting Diodes

Thursday, November 16, 2006, 5:30 pm, Room 3rd Floor Lobby

Session: Electronic Materials and Processing Poster Session
Presenter: M.H. Joo, LG Electronics Institute of Technology, South Korea
Authors: M.H. Joo, LG Electronics Institute of Technology, South Korea
M.K. Baik, LG Electronics Institute of Technology, South Korea
J.K. Choi, LG Electronics Institute of Technology, South Korea
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The chemical structure of the interface between Ag with Li2O and tri (8-hydroxyquinoline) aluminum (Alq) was investigated by using in-situ characterization of x-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS). Li2O on Ag had lower barrier height than LiF on Ag. XPS and UPS results show the interaction between Li2O and Alq leads to gap state formation in HOMO of Alq.