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The effect of intermolecular interactions on the properties of organic semiconductors is investigated using a family of conjugated dendrimers as model systems. Increasing the amount of branching, or generation number, of these molecules reduces the degree of interaction between the chromophores. The effect of this on both photophysical and charge transporting properties is reported. It is found that...
We investigate the dependence of the current-voltage characteristics of single layer light-emitting diodes fabricated with the electron transporting polymer poly(p-pyridine) (PPY). The characteristics are found to vary with temperature and are compared with results obtained for MEH-PPV devices. It is found that the barrier to injection deduced from UPS measurements is not the current limiting factor...
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