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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (2): 143-147. 上一篇    下一篇

研究论文

一种新型红色三线态喹喔啉铱(Ⅲ)配合物的合成及发光性质

张国林1，郭海清*,1，啜玉涛2，邹德春*,2   

  1. (北京大学化学与分子工程学院 1稀土材料化学及应用国家重点实验室 2高分子科学与工程系 北京 100871)
  • 投稿日期:2004-05-11 修回日期:2004-09-22 发布日期:2010-12-10
  • 通讯作者: 邹德春

Synthesis and Luminescence of a New Red Triplet Iridium Quinoxaline Complex

ZHANG Guo-Lin1,GUO Hai-Qing*,1,CHUAI Yu-Tao2,ZOU De-Chun*,2   

  1. (1 State Key Laboratory of Rare Earth Materials Chemistry and Applications, 2 Department of Polymer Science and
    Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871)
  • Received:2004-05-11 Revised:2004-09-22 Published:2010-12-10
  • Contact: ZOU De-Chun

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2456

被引次数

85 | 11

利用2,3-二苯基喹喔啉和水合三氯化铱(IrCl3?H2O)反应, 合成了一种新型喹喔啉铱的配合物[Ir(DPQ)2(acac)], 通过元素分析, 1H NMR和HRMS对配合物结构进行了表征, 结果显示得到的是目标化合物. 利用紫外光谱和荧光光谱对配合物的吸收光谱和光致发光光谱进行了研究. 利用该材料作为磷光材料制备了结构为[ITO/NPB(30 nm)/NPB∶7% Ir(DPQ)2(acac)(25 nm)/PBD (10 nm)/Alq3 (30 nm)/Mg∶Ag (10∶1)(120 nm)/Ag(10 nm)] 的电致发光器件, 研究了其电致发光光谱. 结果表明, 配合物[Ir(DPQ)2(acac)]在476和625 nm处存在单重态1MLCT(金属到配体的电荷跃迁)和三重态3MLCT的吸收峰; 发光光谱结果显示, 在660 nm处有较强的金属配合物三重态的磷光发射; 电致发光光谱显示, 该器件的启动电压是4.25 V, 器件的最大亮度为4910 cd/m2, 外量子效率为5.14%, 器件的流明效率为1.12 lm/W, 是一种新型红色磷光材料.

关键词: 磷光材料, 重金属配合物, 三重态, 喹喔啉铱(III), OLED

A new iridium quinoxaline complex, [Ir(DPQ)2(acac)] (DPQ＝2,3-diphenylquinoxaline, acac＝acetoacetone) was synthesized by reaction of 2,3-diphenylquinoxaline with iridium trichloride hydrate. The complex was characterized by elemental analysis, 1H NMR, and mass spectroscopy. The UV-vis absorption and photoluminescence of the complex were investigated. The complex shows strong 1MLCT (singlet metal to ligand charge-transfer) and 3MLCT (triplet metal to ligand charge-transfer) absorption at 476 and 625 nm, respectively. Organic light emitting diodes (OLED) with a configuration of [ITO/NPB (30 nm)/NPB∶7% Ir(DPQ)2(acac)(25 nm)/PBD (10 nm)/Alq3 (30 nm)/Mg∶Ag (10∶1)(120 nm)/Ag(10 nm)] were fabricated by using this complex as the triplet emissive dopant in NPB. The diodes showed an external quantum efficiency of 5.14% at 7.25 V and brightness of 4910 cd/m2 at 17.25 V. The power efficiency of the device was 1.12 lm/W at 6.0 V, indicating that this complex is a promising electrophosphorescent material.

Key words: photoluminescence, heavy metal complex, triplet, iridium quinoxaline, OLED