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박호열,아티싼마헤쉬와란,진성호 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
A new host and two new highly efficient green-emitting hetroleptic Ir(III) complexes based on amide bridged trifluromethyl substituted phenylpyridine skeleton as main ligand whereas a phosphine oxide containing symmetrical dipyridinylphosphinate and asymmetrical phenyl(pyridin-2-yl)phosphineate as ancillary ligands are designed and synthesized. Their thermal, photophysical, electrochemical and electroluminescent (EL) properties are fully investigated. The optimized devices show excellent EL performances with maximum current efficiency (CEmax) of 68.72 cd/A and maximum external quantum efficiency of 20.82% without compromising the CIE (x, y) color purity.