Flexible Polymer LEDs Using Lanthanide/Polymer Blends: A route to Flexible Three-Color Displays

摘要

PLEDs fabricated on flexible substrates offer advantages over the current standard glass substrates. Flexible display devices are lighter weight than their glass counterparts, fracture-resistant and have a thinner profile making them of particular interest for military land vehicle applications. Flexibility eases placement in instrument panels in tightly confined spaces, while resistance to fracture when accidentally struck by personnel is also a plus. Manufacturing costs should ultimately be lower than with glass substrates. The long-range goal of flexible 3-color displays offers the possibility of lightweight laptop computer screens and roll-up flat panel displays among other applications. During Phase II we increased the efficiency of the polymer/ lanthanide blends by 20% over Phase I performance by the synthesis and incorporation into PLEDs of a new europium complex. We patterned more complex structures on plastic substrates and built, packaged and drove plastic yellow- green polymer displays with more than 6,000 pixels. Limited lifetimes kept blue and red emitting systems from being incorporated into the final plastic displays.