%0 Journal Article
%T Low temperature exciton-exciton annihilation in amphi-PIPE J-aggregates
%A C. Spitz
%A S. Daehne
%J International Journal of Photoenergy
%D 2006
%I Hindawi Publishing Corporation
%R 10.1155/ijp/2006/84950
%X The mobility of optically excited excitons on J-aggregates can be demonstrated by the phenomena of exciton-exciton annihilation. In this intensity-dependent process the collision of two excitons results in their annihilation and hence in a shortening of the mean excitation lifetime. By measuring the intensity-dependent fluorescent lifetime in contrast to the predicted immobilization of the excitons at low temperature we could prove the excellent mobility of the excitons at a temperature (4K), which is far below their expected freezing point.
%U http://www.hindawi.com/journals/ijp/2006/084950/abs/