带烷氧基的苯基蒎烯吡啶铱配合物在聚合物电致发光器件中的应用研究

采用旋涂法将一组带烷氧基的苯基蒎烯吡啶铱(Ⅲ)配合物(Ir(RO-pppy)3)磷光材料掺杂到PVK中,制作出了聚合物电致发光器件:ITO/PE-DOT:PSS(40 nm)/PVK0.7:PBD0.3:(x%.)Ir-complex(80 nm)/CsF(1.5 nm)/Mg:Ag(200 nm).实验结果表明,带有长烷氧基链配体的铱(Ⅲ)配合物能表现出更好的器件行为,当掺杂浓度为3.2%时,器件的最高发光效率达19.9 cd/A(7.8 lm/W,9.1V),CIE为(0.20,0.56);器件最大亮度为15700 cd/m2(8.4V).通过对这组铱(Ⅲ)配合物的光物理行为及电化学性能的研究,考察了主体材料与配合物之间的能级配置以及能量转移的机理.

Study on Application of Tris-(Pinene-2-Phenylpyridine) Iridium(Ⅲ)Complexes Attached Alkoxy Groups in Polymer Light-Emitting Diodes

A new family of Tris-(pinene-2-phenylpyridine)Iridium(III) complexes attached alkoxy groups were doped in PVK and polymer devices ITO/PEDOT:PSS(40 nm)/PVK0.7:PBD0.3:(x %.)Ir-complex(80 nm)/CsF(1.5 nm)/Mg:Ag(200 nm) were fabricated by spin-coating.The results indicated that the devices of the Ir-complex attached hexadecoxy groups exhibit better performance.The maximum luminance efficiency 19.9 cd/A(7.8 lm/W) at 9.1V was obtained with doping concentration of 3.2%,CIE coordinates(0.20,0.56),and the maximum luminance of the devices was 15700 cd/m2 at 8.4 V.Orbit alignment and energy transfer mechanism between the host material and dopant were studied by their photophysics and electrochemistry properties.