Heterogeneous energy landscapes of individual luminescent conjugated polymers

The energy landscape of single, isolated, short- and long-chain luminescent conjugated polymers was studied by photobleaching spectral shift analysis and interphoton time measurements. It has been found that the energy landscape of a polymer is dependent on both the conjugation length distribution as well as the arrangement of these conjugated segments. Energy funnels responsible for abrupt drops in the photoluminescence time trace intensity …