化学学报 ›› 2004, Vol. 62 ›› Issue (22): 2265-2269. 上一篇    下一篇

研究论文

新型铕三元配合物的合成及光致和电致发光性能研究

杜晨霞1, 王志强1, 辛琦2, 吴养洁1, 李文连2   

  1. 1. 郑州大学化学系, 郑州, 450052;
    2. 中国科学院长春光学精密机械与物理研究所, 长春, 130022
  • 收稿日期:2004-03-03 修回日期:2004-07-12 出版日期:2004-11-28 发布日期:2014-02-17
  • 通讯作者: 杜晨霞,E-mail:dcx@zzu.edu.cn E-mail:dcx@zzu.edu.cn
  • 基金资助:
    河南省杰出青年基金(No.0312000700)资助项目.

Synthesis, Photo- and Electro-luminescent Properties of Novel Ternary Europium(Ⅲ) Complexes

DU Chen-Xia1, WANG Zhi-Qiang1, XIN Qi2, WU Yang-Jie1, LI Wen-Lian2   

  1. 1. Department of Chemistry, Zhengzhou University, Zhengzhou 450052;
    2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130022
  • Received:2004-03-03 Revised:2004-07-12 Online:2004-11-28 Published:2014-02-17

利用氮杂苯并[9,10] 菲类中性配体,合成了两个新型铕三元配合物Eu(DBM)3L1和Eu(DBM)3L2 (DBM为二苯甲酰甲烷;L1, L2为氮杂苯并[9,10] 菲类中性配体),以元素分析、红外光谱和紫外光谱对其进行了表征.两种配合物在固体状态下的发射光谱都表现出较强的三价铕离子的特征发射,第二配体对中心离子具有较好的协同敏化发光作用.以TPD和Gd(DBM)3bath (bath=4,7-二苯基-1,10-菲咯啉)分别作空穴传输材料和电子传输材料,以发光配合物和TPD的共蒸镀掺杂作为发光层,制备了如下结构的三层器件ITO/TPD(30 nm)/Eu(DBM)3L1(L2):TPD(1:2)(50 nm)/Gd(DBM)3bath(30 nm)/Mg:Ag,并研究了器件的光电特性.结果表明:这两种配合物具有优良的成膜性和电子传输性,而氮杂苯并[9,10] 菲类中性配体对提高配合物的电子传输性起着至关重要的作用.以Eu(DBM)3L1和Eu(DBM)3L2作为发光材料制备的器件均具有较低的启亮电压(3V),分别在12V,52mA·cm-2和13V,42mA·cm-2时获得最大亮度为148cd·m-2和110cd·m-2的纯正红色发光.

关键词: 铕配合物, 氮杂苯并[9,10] 菲, 光致发光, 电致发光

With two azatriphenylene-type ligands, two novel ternary europium(Ⅲ) complexes Eu(DBM) 3L1 and Eu(DBM)3L2 (DBM=dibenzoylmethanato; L1,L2=azatriphenylene-type ligands) have been synthesized and characterized by elemental analysis, IR and UV-Vis spectra. Photo-luminescent studies show that the synergistic complexation of the second ligand has indeed led to the construction of efficiently emitting europium(Ⅲ) complexes, and as a result both complexes exhibit intense emission typical of Eu3+ ion. Using TPD as hole transporting material and Gd(DBM)3bath (bath=bathophenanthroline) as electron transporting material, three layer devices with the emitting layer formed by codeposition of luminescent complex and TPD were fabricated: ITO/TPD(30 nm)/ Eu(DBM)3L1(L2):TPD(1:2)(50 nm)/Gd(DBM)3bath(30 nm)/Mg:Ag. Based on the EL measurement results, it can be concluded that those ternary europium complexes possess excellent electron-transporting abilities, and the azatriphenylene-type second ligands play an important role in improving the electron-transporting abilities of the complexes. OEL devices with Eu(DBM)3L1 and Eu(DBM)3L2 as emitting materials have low onset driving voltage of 3 V, and the maximum pure red Eu(Ⅲ)-based luminance of 148 cd·m-2 and 110 cd·m-2 were observed at 12 V, 52 mA·cm-2 and 13 V, 42 mA·cm-2 respectively.

Key words: europium complex, azatriphenylene, photoluminescence, electroluminescence