Organic Electro-Phosphorescent Devices Using 2,4,6-Triphenothiazino-1,3,5-Triazine as a Host Material

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.

Keywords:

• Host materials
• organic phosphorescent device
• phenothiazine
• 1,3,5-triazine

Acknowledgments

This paper was supported by the Research Fund of the Kumoh National Institute of Technology.

Notes

^a Measured at 100 cd/m² brightness.