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 bio-sensors 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.