Blue emitting materials containing dibenzo[b,d]furan and dibenzo[b,d]thiophene for organic light-emitting diodes

초록

In this study, we designed and synthesized three blue emitting materials containing dibenzo[b,d]furan and dibenzo[b, d] thiophene. To investigate the electroluminescence (EL) properties, we fabricated devices with following sequences: indium-tin-oxide (180 nm)/N,N'-diphenyl-N,N'-(1-napthyl)-(1,1'-phenyl)-4,4'-diamine (50 nm)/blue emitters (30 nm)/bathophenanthroline (30 nm)/lithium quinolate (2 nm)/Al (100 nm). A device using 1,4-bis(dibenzo[b,d] furan-4-yl)naphthalene showed the deep-blue emission with 1.34% of external quantum efficiency at 30mA/cm(2). The Commission Internationale de l'Eclairage (CIE) coordinates (x,y) of this device was (0.15,0.09) at 6.0 V. (C) 2016 The Japan Society of Applied Physics

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