Synthesis, structure, photo- and electroluminescence of an iridium(III) complex with a novel carbazole functionalized beta-diketone ligand

CORC > 苏州纳米技术与纳米仿生研究所 > 中国科学院苏州纳米技术与纳米仿生研究所 > 印刷电子学部 > 崔铮团队

	Synthesis, structure, photo- and electroluminescence of an iridium(III) complex with a novel carbazole functionalized beta-diketone ligand
	Su, WM (苏文明)
刊名	RSC ADVANCES
	2014
卷号	4 期号:2 页码:554-562
关键词	LIGHT-EMITTING-DIODES ORGANIC LIGHT ANCILLARY LIGAND EXCITED-STATES
通讯作者	Cheng, SZD (Cheng, Stephen Z. D.)
英文摘要	A new iridium complex containing coumarin derivative as a cyclometalated ligand (L-1) and a carbazole-functionalized beta-diketonate (L-2) as the ancillary ligand, namely, Ir(III)bis(3-(pyridin-2-yl)coumarinato-N,C-4)(1-(9-butyl-9H-carbazol-3-yl)-4,4,4-trifluoro-butane-1,3-dionato-O,O)(Ir(L-1)(2)(L-2)), was synthesized. The crystal structure of Ir(L-1)(2)(L-2) was determined via combined wide angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM), which showed pi-pi the interactions of Ir(L-1)(2)(L-2) molecules stacking along the crystal axes. The doped light-emitting diodes using this novel Ir(L-1)(2)(L-2) complex as the phosphorescent dopant were fabricated. At a Ir(L-1)(2)(L-2) concentration of 6.0 wt%, a green-yellow emitting OLED was achieved with a maximum external quantum efficiency (EQE) of 6.11% and a maximum luminous efficiency of 22.55 cd A(-1) at the current density of 6.06 mA cm(-2), and a maximum luminance of 6653 cd m(-2) at 10.7 V. Furthermore, two reference complexes Ir(L-1)(2)(acac) and Ir(L-1)(2)(TTA) were also used as emitters to fabricate OLED devices with the same device configuration. The maximum luminous efficiency of Ir(L-1)(2)(acac) doped device was measured to be 20.04 cd A(-1) at 2.15 mA cm(-2) (10.0 wt%), while the doped device of Ir(L-1)(2)(TTA) had a maximum luminous efficiency of 16.59 cd A(-1) at 1.36 mA cm(-2). The better performances of Ir(L-1)(2)(L-2) doped devices could be largely attributed to an improved hole-transporting property due to the introduction of the carbazole moiety.
收录类别	SCI
语种	英语
WOS记录号	WOS:000327849700006
公开日期	2014-12-01
内容类型	期刊论文
源URL	[http://ir.sinano.ac.cn/handle/332007/1602]
专题	苏州纳米技术与纳米仿生研究所_印刷电子学部_崔铮团队
推荐引用方式 GB/T 7714	Su, WM . Synthesis, structure, photo- and electroluminescence of an iridium(III) complex with a novel carbazole functionalized beta-diketone ligand[J]. RSC ADVANCES,2014,4(2):554-562.
APA	Su, WM .(2014).Synthesis, structure, photo- and electroluminescence of an iridium(III) complex with a novel carbazole functionalized beta-diketone ligand.RSC ADVANCES,4(2),554-562.
MLA	Su, WM ."Synthesis, structure, photo- and electroluminescence of an iridium(III) complex with a novel carbazole functionalized beta-diketone ligand".RSC ADVANCES 4.2(2014):554-562.