Light-emitting diodes based on an alternating copolymer containing triphenylamine and phenylene units

The optical and electroluminescence properties of a light-emitting poly(arylene vinylene) derivative comprising triphenylamine as the arylene unit (TPA–PPV) are demonstrated. TPA–PPV is soluble in common organic solvents, and has a high photoluminescent (PL) quantum yield (${\Phi }_{\mathrm{PL}}\text{=0.94}$ in benzene). A single-layer light-emitting diode Indium–tin–oxide/TPA–PPV/Al utilizing blue–green light-emitting TPA–PPV as the emissive layer is fabricated, and luminance in excess of $\text{612\hspace{0.05em}}{\mathrm{cd/m}}^{\mathrm{2}},$ turn-on voltages of 1.5 V, and high luminous efficiency (3.0 lm/w) are reported.