Electron spectroscopy of fluoridated fullerene films

The chemical and energy structures of highly fluoridated fullerene films have been investigated. Analysis of the complex structure of carbon 1s spectra showed the presence of C-F and C-F2 fragments as well as nonfluoridated carbon atoms with an overwhelming quantity of C-F bonds. The band gap in fluoridated-fullerene and its films was estimated to be 8.0 eV and energy loss on an interband transition at 11 eV was also observed. Comparison of the valence-band spectra of the experimental samples showed that the valence band of fluoridated fullerenes is divided into anionic and cationic parts (similarly to alkali-halide crystals) and suggests that fluoridated fullerenes possess the corresponding properties, making it possible to find new materials with wide practical applications. Fiz. Tverd. Tela (St. Petersburg) 40, 168–172 (January 1998)