Conductivity of fullerene-doped optical glasses

Appropriate amount doping of fullerenes caused insulating phosphate and flu orophosphate optical glasses to be conductive at room temperature. Micropho toluminescence measurements indicated the existence of ordered and disorder ed microstructures. A large number of fullerene-related medium-range microd omains aggregated as self-organized islands along the glass networks, and b rought about connective tissues in the vitreous matrices for percolation mi gration of metal cations. The variation of microphotoluminescence induced b y electric field presented us an indirect way to characterize the random ac tivation, percolation migration, and retrap of metal cations near fullerene -related amorphous islands. (C) 2001 Published by Elsevier Science B.V.