Three novel highly efficient blue bicyclometalated iridium(III) complexes (Ir1–Ir3) were designed and synthesized with 4-(2, 6-difluoropyridin-3-yl)-6-mesitylpyrimidine as primary ligands. The alternation of ancillary ligands had precisely regulated their emitting peaks from sky-blue to deep-blue. These complexes exhibit unimodal emission with PLQYs higher than 90% and lifetimes shorter than 1.1 μs. These complexes also show good thermal stability with T_d > 320 °C. The OLED using complex Ir3 as emitter in 13 wt% exhibited a maximum luminous efficiency of 16.9 cd A⁻¹ with a high EQE of 13.0%. The CIE coordinates of this device are (0.15, 0.16), which are close to the standard blue color region.

以4-（2,6-二氟吡啶-3-基）-6-间甲基嘧啶为主要配体，设计合成了三种新型的高效蓝色双环金属化铱（III）配合物（Ir1-Ir3）。辅助配体的交替精确地调节了它们的发射峰，从天蓝色到深蓝色。这些配合物表现出单峰发射，PLQYs高于90％，寿命短于1.1μs。这些配合物在T _d  > 320°C时也显示出良好的热稳定性。以13wt％使用复合Ir3作为发射体的OLED显示出16.9cd A ^-1的最大发光效率和13.0％的高EQE。该设备的CIE坐标为（0.15，0.16），接近标准的蓝色区域。