物理化学学报 >> 2005, Vol. 21 >> Issue (12): 1407-1410.doi: 10.3866/PKU.WHXB20051216

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红色磷光喹喔啉铂(II)配合物及其有机电致发光器件的制备

张国林;啜玉涛;郭海清;邹德春   

  1. 北京大学化学与分子工程学院, 稀土材料化学及应用国家重点实验室; 高分子科学与工程系, 北京 100871; 辽宁大学化学科学与工程学院, 沈阳 110036
  • 收稿日期:2005-04-20 修回日期:2005-06-06 发布日期:2005-12-15
  • 通讯作者: 郭海清 E-mail:guohq@pku. edu. cn

Synthesis and Electrophosphorescence of a Red Platinum (II) Quinoxaline Complex

ZHANG Guo-Lin;CHUAI Yu-Tao;GUO Hai-Qing;ZOU De-Chun   

  1. State Key Laboratory of Rare Earth Materials Chemistry and Application; 2Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871; 3School of Chemical Science and Engineering, Liaoning University, Shenyang 110036
  • Received:2005-04-20 Revised:2005-06-06 Published:2005-12-15
  • Contact: GUO Hai-Qing E-mail:guohq@pku. edu. cn

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摘要： 利用2,3-二苯基喹喔啉和氯亚铂酸钾(K2PtCl4)反应, 合成了一种新型喹喔啉铂的配合物(DPQ)Pt(acac), 通过元素分析, 1H NMR测定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进行了研究. 利用该材料作为磷光染料制备了结构为ITO/NPB (21 nm) /NPB∶7%(DPQ)Pt(acac) (17.5 nm) /BCP (7 nm)/ Alq3 (21 nm)/ Mg∶Ag(10∶1)(120 nm)/Ag(10 nm)的有机电致发光器件(OLED). 结果表明, 该配合物在442和485 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; 在632 nm 处有较强的金属配合物三重态的磷光发射; 该器件的启动电压是5.0 V, 器件的最大亮度为1516 cd·m-2, 外量子效率为0.66%, 流明效率为0.26 lm·W-1, 是一种红色磷光材料.

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

Abstract: The synthesis and luminescence study of a new platinum quinoxaline complex are reported. The complex, [(DPQ)Pt(acac)](DPQ=2, 3-diphenylquinoxaline, acac=2, 4-pentanedione) was synthesized by reaction of 2, 3-diphenylquinoxaline with K2PtCl4 and shows strong 1MLCT (singlet metal to ligand charge-transfer) and 3MLCT (triplet metal to ligand charge-transfer) absorption at 442 and 485 nm, respectively. Organic light emitting diode (OLED) with a configuration of [ITO/NPB(21 nm) /NPB∶7% (DPQ)Pt(acac)(17.5 nm) /BCP(7 nm)/ Alq3(21 nm)/ Mg∶Ag(10∶1)(120 nm)/Ag(10 nm)] (ITO: indium tin oxide; NPB: 4,4′-bis[N-(1-naphthyl)-N-phenyl-amino] biphenyl; BCP: 2, 9-dimethyl-4, 7-diphenyl-1, 10-phenanthroline; Alq3: tris(8-hydroxyquinoline) aluminum) shows a red emission at 632 nm with an external quantum efficiency of 0.66% at 7.2 V and brightness of 1516 cd·m-2 at 21 V. The power efficiency of the device was 0. 26 lm·W-1 at 7.2 V.

Key words: Photoluminescence, Heavy metal complex, Triplet, Platinum (II) quinoxaline, OLED