Electronic states of core levels and valence bands for KxC60 studied by X-ray photoelectron spectroscopy

✍ Scribed by Y. Fukuda; N. Sanada; M. Nagoshi; T. Takahashi; H. Katayama-Yoshida; K. Kikuchi; S. Suzuki; I. Ikemoto; Y. Achiba; Y. Syono; M. Tachiki

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 282 KB
• Volume: 181
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(91)90117-h

✦ Synopsis

Electronic states of K 2p and C I s core levels and valence bands for KxC6o (x = 0 ~ 6.3 ) have been studied by X-ray photoelectron spectroscopy (XPS). We find two different chemical states of potassium with binding energy 293.8 and 294.9 eV. The K 2P3/2 line becomes a single peak at x=6.3. These results are discussed in terms of the sites occupied by K in KxC6o. The C Is line (285.1 eV ) for C6o is shifted by 0.3 eV to the side of higher binding energy by a very small amount of K, which is consistent with the shift of the valence band. The other line at 284.4 eV appears at 10 min evaporation (x= 0.8 ). The intensity of the former is reduced and that of the latter increases with the evaporation time.