In the past decade, fluorene and its derivatives, some of the most important blue-emissive materials, have been intensively studied for applications such as organic light-emitting diodes, photovoltaic cells, and thin-film transistors. 1, 2 In recent years, fluorenebased oligomers as model systems for corresponding polymers and active materials have attracted much attention. Unlike polymers with inherent characteristics of polydisperation, ...
