Facile synthesis of self-host functional iridium dendrimers up to the fourth generation with N-phenylcarbazole-based polyether dendrons for non-doped phosphorescent organic light-emitting diodes

doi:10.1039/c4py01332h

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	Facile synthesis of self-host functional iridium dendrimers up to the fourth generation with N-phenylcarbazole-based polyether dendrons for non-doped phosphorescent organic light-emitting diodes
	Wang, Yang 1,2; Wang, Shumeng 1,2; Zhao, Nan 3; Gao, Baoxiang 3; Shao, Shiyang 1; Ding, Junqiao 1; Wang, Lixiang 1; Jing, Xiabin 1; Wang, Fosong 1
刊名	POLYMER CHEMISTRY
	2015
卷号	6 期号:7 页码:1180-1191
ISSN号	1759-9954
DOI	10.1039/c4py01332h
英文摘要	A facile synthesis has been demonstrated for the first time to construct self-host functional Ir-cored dendrimers up to the fourth generation on the basis of a newly developed polyether dendron, where the N-phenylcarbazole (NPC) moiety is used as the basic building block instead of benzene to improve charge transport whilst keeping the ease of preparation. With the growing generation number, the dendrimer size can be well tuned in a wide range of 4-10 nm. The obtained fourth generation dendrimer 45NPC-G4 is the largest Ir complex ever reported so far, having a diameter up to 10 nm and a molecular weight as high as 15.9 kDa. Most interestingly, the performance of non-doped phosphorescent organic light-emitting diodes (PhOLEDs) is found to be greatly dependent on the molecular size. For example, 9NPC-G2 (R approximate to 30 angstrom) reveals the best luminous efficiency as high as 50.5 cd A(-1) (56.6 lm W-1, 14.8%), whereas the efficiency of 45NPC-G4 (R approximate to 50 angstrom) sharply drops to 10.5 cd A(-1) (5.6 lm W-1, 3.4%). The results suggest that an appropriate size of 6 +/- 2 nm is desirable to balance the dilemma between luminescence quenching and charge transport, and thereby realize highly efficient non-doped PhOLEDs.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000349445700017
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/53527]
专题	中国科学院化学研究所
通讯作者	Ding, Junqiao
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Hebei Univ, Coll Chem & Environm Sci, Baoding 071002, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yang,Wang, Shumeng,Zhao, Nan,et al. Facile synthesis of self-host functional iridium dendrimers up to the fourth generation with N-phenylcarbazole-based polyether dendrons for non-doped phosphorescent organic light-emitting diodes[J]. POLYMER CHEMISTRY,2015,6(7):1180-1191.
APA	Wang, Yang.,Wang, Shumeng.,Zhao, Nan.,Gao, Baoxiang.,Shao, Shiyang.,...&Wang, Fosong.(2015).Facile synthesis of self-host functional iridium dendrimers up to the fourth generation with N-phenylcarbazole-based polyether dendrons for non-doped phosphorescent organic light-emitting diodes.POLYMER CHEMISTRY,6(7),1180-1191.
MLA	Wang, Yang,et al."Facile synthesis of self-host functional iridium dendrimers up to the fourth generation with N-phenylcarbazole-based polyether dendrons for non-doped phosphorescent organic light-emitting diodes".POLYMER CHEMISTRY 6.7(2015):1180-1191.