光谱学与光谱分析, 2009, 29 (12): 3228, 网络出版: 2010-01-04
一种新型稀土配合物Eu(TTA)(2NH2-Phen)3的发光特性研究
Study on Luminescence Properties of a Novel Rare Earth Complex Eu(TTA)(2NH2-Phen)
摘要
合成了一种新型的稀土配合物Eu(TTA)∶(2NH2-Phen)3,将其作为掺杂物与基质聚乙烯基咔唑(PVK)按照不同质量比混合共溶,旋涂成膜。测量了混合薄膜的光致发光光谱,确认了所合成的Eu(TTA)(2NH2-Phen)3具有发射荧光的能力,进而将其应用于电致发光器件中。还制备了以PVK∶Eu(TTA)(2NH2-Phen)2为发光层,器件结构为ITO/PVK∶Eu(TTA)(2NH2-Phen)3/2,9-dimethyl-4,-diphenyl-1,10-phenan throline(BCP)/8-hydroxyquinoline aluminum(Alq3)/Al的多层器件,得到了Eu3+ 的红色电致发光。研究不同掺杂浓度时器件发光光谱的变化及PVK的发射光谱与Eu(TTA)(2NH2-Phen)3 的吸收光谱的交叠情况,证明了混合薄膜中Eu3+电致发光机理主要是载流子的直接俘获。
Abstract
A novel rare earth complex Eu(TTA)(2NH2-phen)3was synthesized. The Eu complex was blended with poly(N-vinylcarbazole)(PVK)in different weight ratios and spin coated into films. The photoluminescence of Eu (TTA)(2NH2-phen)3was obtained. Multilayer devices with PVK∶Eu(TTA)(2NH2-phen)3as the active layer were fabricated, and the device structure was ITO/PVK∶Eu(TTA)(2NH2-phen)3/2, 9-dimethyl-4, -diphenyl-1, 10-phenan throline(BCP)/8-hydroxyquinoline aluminum(Alq3)/Al. The influence of Eu(TTA)(2NH2-phen)3doping concentration on electroluminescence spectroscopy was studied. It was found that the EL spectra do not change with the doping concentration. The spectral overlapping of the emission spectrum of PVK and the absorption spectrum of Eu(TTA)(2NH2-phen)3is very small. From the above experimental results, it can be demonstrated that the mainly mechanism of Eu(TTA)(2NH22-phen)3EL is charge carrier directly trapped by ligand.
闫光, 张福俊, 徐征, 吕玉光, 赵谡玲, 李秋萍, 孔超, 岳欣. 一种新型稀土配合物Eu(TTA)(2NH2-Phen)3的发光特性研究[J]. 光谱学与光谱分析, 2009, 29(12): 3228. 闫光, 张福俊, 徐征, 吕玉光, 赵谡玲, 李秋萍, 孔超, 岳欣. Study on Luminescence Properties of a Novel Rare Earth Complex Eu(TTA)(2NH2-Phen)[J]. Spectroscopy and Spectral Analysis, 2009, 29(12): 3228.