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Synthesis and Electroluminescent Characteristics of Red Phosphorescent Iridium(III) Complexes for Highly Efficient Organic Light-Emitting Diodes

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The new red phosphorescent iridium(III) complexes, (DMP-MDCPQ)2Ir(tmd), (MTP-MQ)2Ir(tmd) were synthesized for highly efficient red organic light-emitting diodes (OLEDs). The main ligands consisted of electron-donor (3,5-dimethylphenyl), (5-methylthiophene) and electron-acceptor (4-methyl-7,8-dihydro-6H-cyclopenta[g]quinoline), 4-methylquinoline were synthesized by suzuki coupling reaction. The iridium(III) complexes based on main ligands and 2,2,6,6-tetramethyl-3,5-heptanedione(tmd) ancillary ligands were synthesized by Nonoyama reaction and measured by nuclear magnetic resonance (NMR). Also, their luminescence property was investigated by UV-visible spectroscopy and photoluminescence spectroscopy in dichloromethane (DCM) solvent. The manufactured OLEDs devices were characterized by investigation of current density–voltage– luminance, power efficiency, external quantum efficiency, EL spectrum. The iridium(III) complexes will be used as highly efficient dopants for the red OLEDs.
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Keywords: Iridium(III) Complex; Phosphorescent Organic Light-Emitting Diode; Red Dopant

Document Type: Research Article

Affiliations: 1: Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea 2: Department of Information Display, Hongik University, Seoul 04066, Republic of Korea

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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