Abstract
A new 1,3,5-triazine derivative containing the phenothiazine moiety (PTZ-TRZ) has been synthesized for use as a host material of phosphorescent dye. The photoluminescence and electroluminescence properties of PTZ-TRZ were examined. We have fabricated phosphorescent organic light-emitting devices with tris(2-phenylpyridine) iridium [Ir(ppy)3] as a triplet emissive dopant in PTZ-TRZ host. The emission spectrum of the device exhibited a green emission from Ir(ppy)3, indicating that the energy transfer occurs from PTZ-TRZ to [Ir(ppy)3]. The device with 8% doping concentration of [Ir(ppy)3] in PTZ-TRZ showed external quantum efficiency of 3.72% and the peak luminance 6,870 cd/m2.
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