We designed and synthesized Pt-Pytz, a blue phosphorescent Pt(II) complex having 6,6-(1-methoxyethane-1,1-diyl)di(2-(3-(trifluoromethyl)-1H-1,2,4-triazol-5-yl)pyridine) as a tetradentate ligand, and investigated its photophysical, electrochemical, and electroluminescent properties. The complex showed an emission maximum at 449 nm in dichloromethane solution, with a high photoluminescence quantum efficiency of 0.81. Furthermore, the photoluminescence spectrum of Pt-Pytz in the film state contains no additional excimer emission in the long-wavelength region, indicating suppressed molecular aggregation in the solid state. An organic light-emitting diode based on Pt-Pytz as a blue dopant (10% doping) achieved the best external quantum efficiency of 7.0% with a power efficiency of 6.4%, a current efficiency of 11.2 cd/A, and the CIE coordinates of (0.146, 0.218).

我们设计并合成了Pt-Pytz，一种蓝色磷光 Pt(II) 复合物，具有 6,6-(1-甲氧基乙烷-1,1-二基)二(2-(3-(三氟甲基)-1 H -1,2)， 4-三唑-5-基）吡啶）作为四齿配体，并研究了其光物理、电化学和电致发光特性。该配合物在二氯甲烷溶液中在 449 nm 处显示出最大发射，具有 0.81 的高光致发光量子效率。此外，薄膜态Pt-Pytz的光致发光光谱在长波长区域不包含额外的准分子发射，表明固态分子聚集受到抑制。基于Pt-Pytz的有机发光二极管 作为蓝色掺杂剂（10% 掺杂）实现了 7.0% 的最佳外部量子效率，功率效率为 6.4%，电流效率为 11.2 cd/A，CIE 坐标为 (0.146, 0.218)。