Sc，Gd和Lu-配合物的有机电致发光及光伏特性研究

Organic electroluminescence and photovoltaic diodes with structure of diamine derivative/Sc^(3+),Gd^(3+) and Lu^(3+)-complexes

研究了稀土(RE)配合物(RE=Sc、Gd或Lu)(RE-配合物中的RE离子为三价离子)的有机二极管,在电驱动和紫外光照射下分别表现出电致发光(EL)和光伏(PV)特性。作为EL二极管时,m-MT-DATA(4,4′,4-″tris[3-methyl-pheny(phenyl)-amino]triphenyl-amine)和稀土配合物分别用作空穴和电子传输材料,EL发射仅仅来自m-MTDATA和稀土配合物层间界面激基复合物,当配合物的中心金属分别为Sc、Gd或Lu时,EL发射峰分别为656、607~590nm。作为PV二极管时,m-MTDATA和稀土配合物分别作为电子给体(D)和受体(A),它们的开路电压(Voc)分别为1.17、1.65和1.92V。还讨论了EL和PV特性与配合物中中心稀土离子的核电荷数关系。

Rare earth（RE） ion complex organic diodes which behaved both electroluminescence（EL） by electrically driving and photovoltaic （PV） properties under illumination of ultraviolet light were demonstrated. In the bifunctional devices the RE complexes, tris（dibenzoylmethanato）（monobathophenanthroline）-RE^3＋ （RE=Sc, Gd and Lu） and 4,4′, 4″-tris[3-methyl-pheny（phenyl）-amino]triphenyl-amine were used as the electron acceptor and donor, respectively. The EL emissions of the all diodes origined from interface exciplex. The EL emission peaks under electrically excitation and the open voltage under ultravelent （UV） light illumination are 656, 607 and 590nm and 1.17, 1.65 and 1.92V for the devices with Sc, Gd or Lu-complex, respectively. The EL and PV properties were demonstrated to be closely relative with the variety of the nuclear charge of the central RE^3＋ ion in the complexes.