Abstract
Polymeric light-emitting diode (PLED) using fluorine-containing polymer and polyimide heterojunction was fabricated to enhance the device characteristics because of the high thermal stability by the carbon-fluoride bond in fluorine-containing polymers as a heat resistant material. Poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) was used due to its good solubility in common solvents as well as high thermal stability. Poly(etherimide) (PEI) was also introduced as a thermally stable polymer. The PLED in the structure of anode/TPD-dispersed PVdF-HFP/Alq3-dispersed PEl/cathode exhibited turn-on voltage of ca. 14 Vdc. The bright greenish yellow light was emitted at 17 Vdc.
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