Time-Resolved Fluorescence Study of C₆₀ Solution

Using a picosecond excitation source and a time-resolved streak camera detection system, the time-resolved fluorescence spectra of purified C₆₀ have been recorded from toluene solution at room temperature. A fluorescence peak at about 730nm was detected and its lifetime was directly determined to be 1.1±0.1 ns. Two fluorescence peaks obtained from the mixture of C₆₀ and C₇₀ at 676 and 696nm were mainly related to C₇₀ content.