一种新型稀土配合物Eu(TTA)_2(N-HPA)Phen的发光特性研究

Study on Luminescence Properties of a Novel Rare Earth Complex Eu(TTA)_2(N-HPA)Phen

合成了一种新的含有3个配体的稀土配合物Eu(TTA)2(N-HPA)Phen(TTA=噻吩甲酰基三氟丙酮,N-HPA=N-苯基邻氨基苯甲酸,phen=邻菲咯啉)。将稀土配合物作为掺杂物与基质PVK按照不同质量比混合共溶,旋涂成膜。通过荧光光谱,分析了薄膜的发光特性,并将其应用于有机电致发光。研究了PVK和Eu(TTA)2(N-HPA)Phen之间的能量传递,并且制备了发光层为PVK∶Eu(TTA)2(N-HPA)Phen,结构为ITO/PVK∶Eu(TTA)2(N-HPA)Phen/BCP/Alq3/Al的多层器件,发现改变PVK和稀土配合物的掺杂比,可以不同程度地抑制PVK的发光,最终得到纯的Eu3+的红色发光。实验结果证明,在PVK∶Eu(TTA)2(N-HPA)Phen=5∶1的质量比下,从PVK到稀土配合物之间存在充分的能量传递。

A novel rare earth complex Eu（TTA）2（N-HPA） Phen, which contains three different ligands, was synthesized （TTA = thenoyhrifluoroacetone, N- HPA = N-phenylanthranilic acid, phen = 1, 10-phenathroline）. The Eu complex was blended with poly （N-vinylcarbazole） （PVK） in different weight ratios and spin coated into films. The luminescence properties og films were investigated by fluorescence spectroscopic analysis. And the complex was used as an electroluminescent material. The energy transfer between PVK and complex was discussed. Muhilayer devices with the light emitting layer PVK： Eu （TTA）2 （N-HPA） were fabricated, and its structure was ITO/PVK： Eu （TTA）2 （ N-HPA ） phen/BCP/Alq3/Al. Varying the mass proportion of PVK/Eu will inhibits emission of PVK to different degrees. Finally the pure red luminescence of europium （ Ⅲ ） was observed when PVK ： Eu = 5 ： 1. It proves an ample energy transfer from PVK to rare earth complex.