The electroluminescent characteristics of two sublimable cationic iridium(III) complexes that bear the same coordinated iridium(III) cation but different tetraphenylborate-type negative counterions have been investigated. Blue-green-emitting devices were successfully fabricated from these complexes using various preparation processes, namely, spin-coating and vacuum evaporation deposition. Experiments indicated that devices with vacuum-deposited emissive layers showed superior photoelectric properties relative to devices with spin-coated emissive layers, including a maximum current efficiency of 27.91 cd A-1 , an external quantum efficiency of 10.48 %, a power efficiency of 27.73 lm W-1 and the highest luminance of up to 25.34×103  cd m-2 , whereas the turn-on voltages were quite low. The overall device performance surely ranks among the best of phosphorescent organic light-emitting diodes based on ionic transition-metal complexes.

中文翻译：

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真空沉积与自旋涂覆的发射层，用于制造高性能蓝绿色发射二极管。

研究了两种具有相同配位铱（III）阳离子但具有不同四苯基硼酸酯型负抗衡离子的可升华阳离子铱（III）配合物的电致发光特性。使用各种制备方法，即旋涂和真空蒸发沉积，成功地由这些配合物制造了发出蓝绿色光的器件。实验表明，具有真空沉积发射层的器件相对于具有旋涂发射层的器件表现出优异的光电性能，包括最大电流效率为27.91 cd A-1，外部量子效率为10.48％，功率效率为27.73 lm W-1和最高亮度高达25.34×103 cd m-2，而开启电压非常低。