Emission of a single conjugated polymer chain isolated in its single crystal monomer matrix - art. no. 087401

The excitonic luminescence of a highly ordered single conjugated polymer ch ain is studied by microphotoluminescence. At T less than or equal to 10 K i t consists of a single Lorentzian line. The linewidth increases linearly wi th T between 6 and 60 K, from 350 mu eV at 6 K, indicating a pure dephasing time of similar to2 ps. Above 10 K, other neighboring regions along the ch ain direction start to emit at a slightly higher (by similar to1 meV) energ y. This indicates very small inhomogeneous broadening, very long chains (gr eater than or equal to 10 mum), and a long range and very rapid exciton ene rgy transfer (>10 mum in <100 ps).