[15p-E402-1~18] 12.4 Organic light-emitting devices and organic transistors

[15p-E402-17] Synthesis and Device Applications of C₃-Chiral Truxenes Showing Excellent Circularly Polarized Emission Properties

〇Fumitaka Ishiwari¹, Takuya Omine¹, Takashi Hirose², Tadashi Mori¹, Naoya Aizawa¹, Akinori Saeki¹ (1.Osaka Univ., 2.Kyoto Univ.)

Keywords:circularly polarized luminescence, truxene, Organic Electroluminescence Device

We show that C3-chiral truxenes exhibit excellent CPL with dissymmetric factor (g value) of the order of 10–2. Vibrational calculations and variable-temperature CPL measurements suggested that molecular vibrations dramatically lower the g value of CPL. Furthermore, at low temperature, C3-chiral trimethyltruxene exhibits long-lifetime and strong phosphorescent CPL. A conformationally rigid double-decker-type truxene with robust CPL properties at high temperature was applied as an emitter of electroluminescence device exhibiting circularly polarized electroluminescence with high g value. In the presentation, we will show the theoretical analysis of the CPL property of C3-chiral truxenes and device application.