Orange phosphorescent iridium(III) complexes, (DMBT)₂Ir(acac) and (TBT)₂Ir(acac), based on either 2-(3,4-dimethylphenyl)benzo[d]thiazole (DMBT) or 2-(4-(trimethylsilyl)phenyl)benzo[d]thiazole (TBT) as the cyclometalated main ligands and acetylacetone (acac) as an ancillary ligand, were synthesized for solution-processed organic light-emitting diodes (OLEDs). The Ir(III) complex, (BT)₂Ir(acac), which consists of 2-phenylbenzo[d]thiazole (BT) as the main ligand and acac as the ancillary ligand, was also synthesized as a reference. The photophysical, electrochemical, and electroluminescent properties of these Ir(III) complexes were investigated. The OLED fabricated using (TBT)₂Ir(acac) exhibited significantly improved luminance and external quantum efficiency (EQE) as self-quenching at high doping concentrations was successfully prevented by introducing bulky trimethylsilyl groups. The EL spectrum of (TBT)₂Ir(acac) exhibited an emission maximum at 578 nm with a full-width-at-half-maximum of 74 nm and Commission Internationale de L'Eclairage coordinates of (0.55, 0.44) at 1000 cd/m². The device with 7 wt% (TBT)₂Ir(acac) dopant exhibited a maximum luminance of 6837 cd/m², maximum luminous efficiency of 25.26 cd/A, power efficiency of 12.37 l m/W, and EQE of 9.94%.

橙色磷光铱（III）配合物，（DMBT）₂的Ir（ACAC）和（TBT）₂的Ir（ACAC）的基础上，无论是2-（3,4-二甲基苯基）苯并[ d ]噻唑（DMBT）或2-（合成了4-（三甲基甲硅烷基）苯基）苯并[ d ]噻唑（TBT）作为环金属化的主要配体，并乙酰丙酮（acac）作为辅助配体，用于溶液处理的有机发光二极管（OLEDs）。还合成了以2-苯基苯并[ d ]噻唑（BT）为主配体和acac作为辅助配体的Ir（III）配合物（BT）₂ Ir（acac）。研究了这些Ir（III）配合物的光物理，电化学和电致发光性质。使用（TBT）制造的OLED₂ Ir（acac）表现出显着改善的亮度和外部量子效率（EQE），因为通过引入庞大的三甲基甲硅烷基可以成功防止高掺杂浓度下的自猝灭。（TBT）₂ Ir（acac）的EL光谱在578 nm处显示出最大发射，半峰全宽为74 nm，在1000 cd时半乳糖国际委员会的坐标为（0.55，0.44） / m ²。具有7 wt％（TBT）₂ Ir（acac）掺杂剂的器件的最大亮度为6837 cd / m ²，最大发光效率为25.26 cd / A，功率效率为12.37 l m / W，EQE为9.94％。