Cyclometallated platinum(ii) complexes of 1,3-di(2-pyridyl)benzenes for solution-processable WOLEDs exploiting monomer and excimer phosphorescence
作者:Wojciech Mróz、Chiara Botta、Umberto Giovanella、Ester Rossi、Alessia Colombo、Claudia Dragonetti、Dominique Roberto、Renato Ugo、Adriana Valore、J. A. Gareth Williams
DOI:10.1039/c1jm10193e
日期:——
Two cyclometallated platinum(II) complexes, N^C^N-5-fluoro-1,3-di(2-pyridyl)benzene platinum(II) chloride, FPtCl, and N^C^N-5-methyl-1,3-di(2-pyridyl)benzene platinum(II) isothiocyanate, MePtNCS, have been synthesized and characterized. Both complexes are highly efficient phosphorescent green emitters which can also display excimer emission in the red region. They have been studied as triplet emitters in solution-processed, multilayer organic light-emitting diodes (OLEDs), together with the known complex of 5-methyl-1,3-di(2-pyridyl)benzene, MePtCl, for comparison. The trend in efficiencies of the OLEDs prepared correlates with the charge-trapping properties of the complexes. The most efficiently emitting complex, FPtCl, was used as the dopant in a solution-processed white OLED, employing monomer and excimer emission.
我们合成并表征了两种环金属化铂(II)配合物--N^C^N-5-氟-1,3-二(2-吡啶基)苯氯化铂(II)(FPtCl)和 N^C^N-5-甲基-1,3-二(2-吡啶基)苯异硫氰酸铂(II)(MePtNCS)。这两种配合物都是高效的绿色磷光发射体,也能在红色区域显示出准分子发射。研究人员将它们与已知的 5-甲基-1,3-二(2-吡啶基)苯复合物 MePtCl 一起作为溶液处理多层有机发光二极管(OLED)中的三重发射器进行了比较。所制备的有机发光二极管的效率趋势与配合物的电荷捕获特性相关。发光效率最高的复合物 FPtCl 被用作溶液处理白光 OLED 的掺杂剂,采用单体和准分子发射。