The field of polymer optoelectronics has witnessed a great deal of progress since the discovery of the conducting properties of polyacetylene in 1977. 1 Derivatives such as poly(9,9-dialkylfluorene )s have received considerable attention as candidates for the active material in optoelectronic devices such as organic light-emitting diodes (OLEDs), due to their good chemical stability and high luminescence quantum efficiency. 2,3 The majority of emitting polymers currently in ...