Interface properties of FeMgOCu-phthalocyanine metal-insulator-organic semiconductor structures

Nyun Jong Lee, Yu Jeong Bae, Tae Hee Kim, Eisuke Ito, Masahiko Hara

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1 Scopus citations


Hybrid interface structures consisting of organic copper-phthalocyanine (CuPc) and ferromagnetic metal Fe(001) with and without a MgO(001) cover were investigated by using surface sensitive techniques of X-ray photoemission spectroscopy and ultraviolet photoemission spectroscopy. A systematic study of the energy level alignment at the interfaces was carried out. For the hybrid interfaces considered here, our results indicate that the insertion of an artificially-grown ultra-thin oxide layer MgO(001) can prevent Femi level pinning and induce a rather large interface dipole, thereby resulting in remarkable CuPc Fermi level shifts when the thickness of the CuPc film is less than 3 nm. This study provides a better understanding of spin filtering in MgO-based organic spin devices and a new way to alter the interface electronic structure of metalorganic semiconductor hybrid systems.

Original languageEnglish
Pages (from-to)1995-2000
Number of pages6
JournalJournal of the Korean Physical Society
Issue number12
StatePublished - 2014

Bibliographical note

Publisher Copyright:
© 2014, The Korean Physical Society.


  • Cu-phthalocyanine
  • Interface properties
  • Organic spintronics
  • UPS
  • XPS


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