Optical Transition in Reduced C60 Thin Films

ABSTRACT Absorption spectra of C60 thin film reduced in an electrochemical cell are studied. The results are compared with data of chemically reduced C60 anions. Absorption with relatively broad line-width below the energy of 1 eV is observed in the film besides the peaks at 1.14 ∼ 1.4 eV observed in C60 anion solution. The electronic states of reduced COT are discussed in terms of the solid state effect.