Abstract
Solid-state polymer light-emitting electrochemical cells have been fabricated using thin films of blends of polymer electrolytes and urethane-containing polythiophene (PURET) as active material. We have prepared various types of polymer electrolytes such as poly(acrylate)s and poly(ether ester)s. The devices emit orange-red light with the maximum intensity at 590 nm at room temperature. The typical voltage (V) – current density (I) – luminance characteristics of an ITO / PURET + polymer electrolyte complexed with LiClO4 / Al cell under forward and reverse bias conditions were measured. The I-V curve is symmetric at zero bias. The apparent threshold voltages for current injection and visible light emission are around 2 ∼ 3V.
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