Electrochemiluminescence Studies of Phosphorescent Dopant and Host Molecules of Polymer Light‐emitting Diodes

Abstract

Electrochemiluminescence (ECL) from tris(2-phenylpyridine)irdium [Ir(ppy) 3 ] was investigated following cross reaction of its anion with oxidized poly(N-vinyl-carbazole) (PVK) and its cation with reduced 2-(4-biphenylyl)-5-(4-tert-butyl-phenyl)-1,3,4-oxadiazole (PBD). Both cross reactions show Ir(ppy) 3 emission and the cross reaction ofPVK /Ir(ppy)• -showed the highest ECL intensity.

Poly(carbazole-co-1,4-dimethoxybenzene): Synthesis, Electrochemiluminescence Performance, and Application in Detection of Fe3+

“…CPs had always been regarded as insulating materials until Burroughes of Cambridge University first observed the ECL signal of poly (phenylene vinylene) (PPV) in 1990 [ 25 ], which opened a new era in the research of CPs as ECL materials. Since then, more and more polymer ECL active materials such as polypyrrole (PPY) [ 26 ], polyvinyl carbazole (PVK) [ 27 ], polythiophene (PT) [ 28 ] and polyfluorene (PF) were gradually observed and exhibited unique optical and electrical properties, such as good expandability, strong light trapping ability, low energy consumption, high fluorescence quantum yield, great biocompatibility, low price, and other unmatched advantages [ 29 ]. However, most of the traditional CPs used for ECL bioassays were liquid phase and might bind non-specifically with other substances in the aqueous phase, which would affect the detection accuracy.…”