Electrical and Optical Properties of Ion Implanted C₆₀

Abstract

Electrical studies (based on conductivity and thermopower) and optical studies have been performed on implanted C₆₀ thin films. In order to obtain the doping effect by charge transfer from alkali atoms to C₆₀ molecules or to large fragments (stemming from degradation effects), the optimization of implantation parameters leads to the values: E = 30keV, D  10¹⁵ions/cm², T=77K. The conductivity [sgrave] and the thennopower S reach the values: σ ≅ 10²ωcm⁻¹ and S ≅ -50μV/K.