Metal/Alq3 interactions in organic light emitting devices : The different roles of Mg, Al, and Li atoms

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)8827-8837
Journal / PublicationJournal of Chemical Physics
Volume116
Issue number20
Publication statusPublished - 22 May 2002

Abstract

The geometrical and electronic structures of tris(8-hydroxy-quinoline) aluminum (Alq3) molecule interacting with metals like magnesium, aluminum and lithium used in organic light emitting devices were studied by first principle calculations using density functional theory. The favourable complexation for the interacting systems was the metal atom inserting into the core of the Alq3 molecule with the metal atom bridging two oxygen atoms and being coplanar with one of the quinoline ligands. The calculated electronic structures showed that there were only slight changes in the Alq3 frontier orbitals for Mg-Alq3and Li-Alq3 complexations.