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

Journal Article · Sat Dec 28 04:00:00 EST 2013 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4854815· OSTI ID:22217724

Cheng, Chiu-Ping; Lee, Cheng-Wei; Chu, Yu-Ya ^[1]; Wei, Ching-Hsuan ^[2]; Pi, Tun-Wen ^[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)

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.

• OSTI ID: 22217724
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 24 Vol. 114; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CURRENTS
DEPOSITS
DIPOLES
EFFICIENCY
FULLERENES
INTERFACES
MAGNESIUM
MOLECULAR ORBITAL METHOD
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
SPECTRA
SURFACES
SYNCHROTRON RADIATION