Author/Authors :
Lemmer، نويسنده , , U. and Heun، نويسنده , , S. and Mahrt، نويسنده , , R.F. and Scherf، نويسنده , , U. and Hopmeier، نويسنده , , M. and Siegner، نويسنده , , U. and Go¨bel، نويسنده , , E.O. and Mu¨llen، نويسنده , , K. and Ba¨ssler، نويسنده , , H.، نويسنده ,
Abstract :
We study the dynamics of optical excitations in solid films of ladder-type poly(para-phenylene) (LPPP). A low-energy emission band is observed in the photoluminescence spectrum of solid films of this π-conjugated polymer, which is absent in LPPP solutions. We show that the low-energy luminescence can be attributed to aggregates between subunits of the polymer chains. Energy transfer into aggregate states strongly affects the dynamics of excitations in solid LPPP. We further discuss the influence of non-radiative defects on the dynamics.
