We have designed and synthesized two new orange light-emitting homoleptic iridium complexes ((p-FSOPyTPA)₃Ir and (m-FSOPyTPA)₃Ir) containing dibenzothiophene sulfone and triphenylamine frameworks. Solution-processed polymer light-emitting devices (PLEDs) are also prepared using these as-synthesized iridium complexes with a single-emission-layer (SEL) structure of ITO/PEDOT:PSS/poly-TPD/EML/TPBI/Ba/Al. Both the iridium complexes exhibited good thermal stability with a T_d > 430 °C. Compared to (p-FSOPyTPA)₃Ir, (m-FSOPyTPA)₃Ir displayed much better thermal, photophyscial and electroluminescent properties owing to the different coordinate positions of dibenzothiophene sulfone. More importantly, the orange-emitting PLEDs based on (m-FSOPyTPA)₃Ir exhibited a maximum luminous efficiency (LE) of 4.65 cd/A, a maximum external quantum efficiency (EQE) of 2.03%, and the Commission Internationale de L'Eclairage (CIE) coordinates of (0.54, 0.42), when the iridium complex doped into a matrix of PVK/OXD-7 with a concentration of 4 wt %. Our preliminary work could provide a promising orange emitters candidate for the development of solution-processable highly efficient white PLEDs.

我们已经设计并合成了两个新的橙色发光均质铱络合物（（p -FSOPyTPA）₃ Ir和（m -FSOPyTPA）₃ Ir），其中含有二苯并噻吩砜和三苯胺骨架。还使用这些具有ITO / PEDOT：PSS / poly-TPD / EML / TPBI / Ba / Al的单发射层（SEL）结构的合成铱复合物制备了溶液处理的聚合物发光器件（PLED）。 。两种铱配合物均表现出良好的热稳定性，T _d  > 430°C。与（p -FSOPyTPA）₃ Ir相比，（m -FSOPyTPA）₃由于二苯并噻吩砜的坐标位置不同，Ir显示出更好的热，光物理和电致发光性能。更重要的是，基于（m -FSOPyTPA）₃ Ir的橙色发光PLED的最大发光效率（LE）为4.65 cd / A，最大外部量子效率（EQE）为2.03％，而国际照明委员会当铱络合物掺入浓度为4 wt％的PVK / OXD- 7基质中时，Eclairage（CIE）坐标为（0.54，0.42）。我们的初步工作可以为开发可溶液处理的高效白色PLED提供有希望的橙色发光体候选。