Determination of the valence electronic structure of condensed trimethylaluminum by photoelectron spectroscopy and molecular orbital calculations

T. Motooka, A. Rockett, P. Fons, J. E. Greene, W. R. Salaneck, R. Bergman, J. E. Sundgren

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The electronic structure of dimerized trimethylaluminum (TM A), Al2 (CH3)6, condensed at low temperatures on clean substrates in ultrahigh vacuum, has been investigated using ultraviolet and x-ray photoelectron spectroscopies together with molecular orbital (MO) calculations carried out using the self consistent field Xa-scattered wave method. Valence band spectra revealed three broad peaks centered at ~15.0, 7.5, and 4.5 eV below the Fermi level. The peaks were assigned, based upon computed MO results, to correspond primarily to C(2s) + H(1s), C(2p)+ H(1s), and Al(3p) + C(2p) bonding orbitals, respectively, in dimerized TMA. The wave functions of the upper MO levels corresponding to the 4.5-eV peak were predominantly composed of Al(3p) orbitals.

Original languageEnglish
Pages (from-to)3115-3119
Number of pages5
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume6
Issue number6
DOIs
Publication statusPublished - 1988 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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