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 chain is studied by microphotoluminescence. At T less than or equal to 10 K it consists of a single Lorentzian line. The linewidth increases linearly with 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 chain direction start to emit at a slightly higher (by similar to1 meV) energy. This indicates very small inhomogeneous broadening, very long chains (greater than or equal to 10 mum), and a long range and very rapid exciton energy transfer (>10 mum in <100 ps).