A new and efficient trifluoromethyl modified sky-blue iridium(III) coordination compound (Ir-CF₃) is well designed and prepared by using bis(trifluoromethyl) modified 4-methyl-2-phenylpyridine as the cyclometalating ligand and 2-(1H-imidazol-2-yl)pyridine as the auxiliary ligand. Ir-CF₃ shows intensive sky-blue phosphorescence (465 nm with 494 nm as shoulder), high solution photoluminescence efficiency (0.22). The incorporation of trifluoromethyl moiety into the complex not only enhances the robust chemical stability but also provides the steric hindrance beneficial to organic light-emitting diodes. The sky-blue OLEDs based on this complex show narrow emission band with full width at half maxima of 54 nm. The peak power efficiency, current efficiency and external quantum efficiency of electroluminescence are as high as 36.05 lm/W, 51.45 cd/A and 21.74%, respectively.

以双（三氟甲基）修饰的4-甲基-2-苯基吡啶为环金属化配体，2-（1 H）配位化合物（Ir-CF ₃ -咪唑-2-基)吡啶作为辅助配体。红外-CF ₃显示强烈的天蓝色磷光（465 nm，肩峰为 494 nm），溶液光致发光效率高（0.22）。三氟甲基部分掺入复合物中不仅增强了强大的化学稳定性，而且还提供了有利于有机发光二极管的空间位阻。基于这种复合物的天蓝色 OLED 显示出窄发射带，半峰全宽为 54 nm。电致发光的峰值功率效率、电流效率和外量子效率分别高达36.05 lm/W、51.45 cd/A和21.74%。