Trimethylsilane-Containing Donor-Acceptor-Donor Type Material for Red Fluorescent Organic Light-Emitting Diodes

초록

In this paper, we described a donor acceptor donor type red fluorescence material, which have the bulky trimethylsilane groups in the donor moieties. To explore the electroluminescence properties of these materials, multilayered OLEDs were fabricated with a device structure of ITO /2-TNATA (60 nm)/NPB (40 nm)/Red 1 (2%):rubrene (50%):Alq(3) (30 nm)/Alq(3) (60 nm)/Liq (3 nm)/Al (100 nm). A device using Red 1 as the dopant material showed a maximum luminance of 5138 cd/m(2) at 12.0 V, maximum luminous efficiencies of 1.62 cd/A, and maximum power efficiencies of 1.04 km/W. The Commission Internationale de L'Eclairage coordinates of this device was (0.67, 0.33) at 7.0 V, which indicated stable color chromaticity at various voltages.

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