SYNTHESIS OF NEW IRIDIUM (III) PHENYLPYRIDINE COMPLEX AND ITS OLED APPLICATION
Published: 29 Jul 2017
Abstract: A new Iridium(ІІІ)bis[2-phenylpyridinato-N,C2’]-[1-(4-fluorophenyl)-3-(4-methoxyphenyl)propane-1,3-dionate], (ppy)2Ir(fmtdbm) was synthesized and identified by 1H NMR and elemental analysis. In this study we present the photophysical and electrochemical properties of the new complex and investigate the possibility of its application as a dopant (0 – 10 w%) in the hole transporting layer (HTL) of the simplest organic light emitting diode (OLED) structure: Anode/HTL/ETL/Cathode. Here as a HTL we used N,N’-bis(3-methylphenyl)-N,N’-diphenylbenzidine (TPD), incorporated in Poly(N-vinylcarbazole) (PVK) matrix, as an electron-transporting layer (ETL) - Tris-(8-hydroxyquinoline) aluminum (Alq3), as anode - indium tin oxide (ITO) and aluminium -as cathode. We established that at different concentrations of the dopant OLED emitted green-orange light in different tunes. It was found that the lightly-doped (around 1.5 wt%) samples had better luminescence efficiency in all region of applied voltages, in comparison with undoped device.
Keywords: oled, pholeds, iridium complexes
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