Ultraviolet Photoelectron Spectra of Potassium Dosed Higher Fullerenes |
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| Authors: | Kentaro Iwasaki Kazunori Umishita Shojun Hino Koichi Kikuchi Yohji Achiba |
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| Institution: | 1. Fac. of Eng. and Grad. School of Sci. &2. Tech. , Chiba University , Chiba , 263-8522 , Japan;3. Dept. of Chemistry , Tokyo Metropolitan University , Hachioji , 192-0397 , Japan |
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| Abstract: | Abstract Ultraviolet photoelectron spectra of potassium dosed higher fullerenes are measured with a synchrotron radiation light source. Potassium dosing to higher fullerenes brings a new structure between the spectral onset of pristine fullerenes and the Fermi level. As the spectral edge of the new structure does not cross the Fermi level, potassium dosed higher fullerenes are not metallic but semiconductive. When the potassium is excessively dosed to the fullerenes, the lower binding energy structures above 5 eV become faint. In contrast to this phenomenon, four distinct structures appear between 5 and 14 eV. |
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| Keywords: | higher fullerene electronic structure photoelectron spectra UPS potassium doping |
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