Growth of metal-phthalocyanine on GaAs(001): An NEXAFS study

G. Cabailh*, I. T. McGovern, A. Vearey-Roberts, A. Bushell, D. A. Evans

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Proceeding (Non-Journal item)

1 Citation (SciVal)


Organic semiconductors molecules are often employed as a thin film interlayer to improve electronic and optoelectronic devices. The characterisation of the interface is thus important to understand the physical properties between the organic thin film and the inorganic semiconductor substrate. Also the orientation of the molecules within the film can be of importance. Two molecules, SnPc and MgPc, are studied on argon sputtered GaAs(001)-1×6 using a surface sensitive synchrotron-based technique, Near Edge X-Ray Absorption Fine Structure (NEXAFS). With NEXAFS, the orientation of the molecule is investigated. It is shown that these two molecules have different orientations in thick films, e.g. SnPc lying close to flat to the surface whereas MgPc is 'standing up'. At the monolayer level, however, the SnPc spectra are unchanged, while the MgPc spectra show an orientation reversal. The spectra are discussed with respect to bulk crystalline strucures.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering, 2005
Number of pages7
Publication statusPublished - 2005
EventOpto-Ireland 2005: Optical Sensing and Spectroscopy - Dublin, Ireland
Duration: 04 Apr 200506 Apr 2005

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceOpto-Ireland 2005: Optical Sensing and Spectroscopy
Period04 Apr 200506 Apr 2005


  • GaAs
  • Organic
  • Phthalocyanine
  • Semiconductor


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