Polyfluorene Polyelectrolytes and Their Precursors Processable from Environment-Friendly Solvents (Alcohol or Water) for PLED Applications

Conjugated Polyelectrolytes (CPs) have been successfully used as highly sensitive materials in chemo and biosensors for many years. But in general CPs were not very successful as a light emitting layer in polymer light-emitting diodes (PLEDs). Until recently, it was found that polyfluorene-based CPs and their precursors showed excellent unique characteristics different from the traditional conjugated polymers as light-emitting materials. In this review we summarize recent work on the design, synthesis of polyfluorene-based CPs and their precursors and their successful use in PLEDs.