Development of Deuterated Carbenic Ir(III) Complexes for the Solution- and Vacuum-Processed Deep-Blue Phosphorescent Organic Light-Emitting Diodes
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초록
내용
Organic Light Emitting (OLED) have focused on developing stability, efficiency and lifetime for next-generation phosphorescent OLED (PHOLED). Herein, we designed and synthesized a new Ir(III) NHC complexes with replace the hydrogen to deuterium compounds, mer-Ir(D7)3 which exhibited bright, deep-blue emission, with emission maximum between 450 and 460 nm. In this study, mer-tris-(N-D5-phenyl, N-D2-benzyl-pyridoimidazol-2-yl)iridium(III) (mer-Ir(D7)3) as dopant, TSPO1 and TPBi as host exhibited high efficiency of 19.2% CIE(x, y) coordinates of (0.148, 0.112) and maximum brightness (Lmax) of 21311 cd m-2, by device 2 with a 50 vol% doping ratio. The result findings, the deuteraion of Ir(III) complex is a promising candidate for reducing power consumption in display applications.