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Title: The effect of magnesium added at C{sub 60}/Rubrene heterointerfaces

This study examines the effect of adding magnesium (Mg) at C{sub 60}/rubrene heterointerfaces by using synchrotron-radiation photoemission spectroscopy. The heterointerface was obtained by depositing C{sub 60} on a 4-Å Mg/rubrene surface. The photoemission spectra showed that the added Mg preferentially interacts with and transfers negative charges to C{sub 60}. The interfacial dipole potential was significantly enlarged, as was the separation between the lowest unoccupied molecular orbital of C{sub 60} and the highest occupied molecular orbital of rubrene. The results demonstrate that the addition of Mg should be an effective method for improving the efficiency of light- and current-generating devices.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Department of Electrophysics, National Chiayi University, Chiayi 60004, Taiwan (China)
  2. Department of Material Science, National Chiao-Tung University, Hsinchu 30076, Taiwan (China)
  3. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan (China)
Publication Date:
OSTI Identifier:
22217724
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 24; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CURRENTS; DEPOSITS; DIPOLES; EFFICIENCY; FULLERENES; INTERFACES; MAGNESIUM; MOLECULAR ORBITAL METHOD; PHOTOELECTRON SPECTROSCOPY; PHOTOEMISSION; SPECTRA; SURFACES; SYNCHROTRON RADIATION