Unsymmetrical dendrimers as highly efficient light-emitting materials: Synthesis, photophysics, and electroluminescence

doi:10.1021/jp801613v

CORC > 化学研究所 > 中国科学院化学研究所

	Unsymmetrical dendrimers as highly efficient light-emitting materials: Synthesis, photophysics, and electroluminescence
	Zhang, Hengjun 1,2; Xu, Xinjun 1,2; Qiu, Wenfeng 1; Qi, Ting 1,2; Gao, Xike 1,2; Liu, Ying 1,2; Lu, Kun 1,2; Du, Chunyan 1,2; Yu, Gui 1; Liu, Yunqi 1
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2008-08-28
卷号	112 期号:34 页码:13258-13263
ISSN号	1932-7447
DOI	10.1021/jp801613v
英文摘要	Highly efficient light-emitting materials can be archived by a rational design that involves rigid dendron and pi-conjugated chromophores. This strategy is exemplified by three unsymmetrical dendrimers 5-(2',3',4',5'-tetraphenyl)phenyl-5'-(9- anthracenyl)-2,2'-bithiophene (1), 5-(2',3',4',5'-tetraphenyl)phenyl-5'-(1-pyrenyl)2,2' -bithiophene (2), and 5-(2'.3',4'.5'-tetraphenyl)phenyl-5'-(1-pyrenylethynyl)-2.2'- bithiophene (3). Thermogravimetric analysis and differential scanning calorimetry suggest that unsymmetrical dendrimers 1 and 2 have good thermal stability (>400 degrees C) and high glass transition temperature (> 130 degrees C) which make them promising candidates for highly stable organic light-emitting devices. The comparative study on their UV-vis absorption and fluorescence spectra in Solution and as thin films indicates that the unsymmetrical dendrimers can form intermolecular pi-pi stacking in the solid state. Electroluminescence (EL) devices using them as en-litters were made, and it was found that they emit intense green light, and the maximum luminance was 8659 cd/m(2) at 13.5 V with a maximum efficiency of 4.9 cd/A for 1. The further comparative study on the EL performance of 1-3, combined with their single crystal structures, demonstrated that with felicitously chosen pi-conjugated chromophores and better control of the space between the chromophore and dendron highly efficient light-emitting materials will be realized.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000258633600032
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/63399]
专题	中国科学院化学研究所
通讯作者	Liu, Yunqi
作者单位	1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Organ Solids, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hengjun,Xu, Xinjun,Qiu, Wenfeng,et al. Unsymmetrical dendrimers as highly efficient light-emitting materials: Synthesis, photophysics, and electroluminescence[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2008,112(34):13258-13263.
APA	Zhang, Hengjun.,Xu, Xinjun.,Qiu, Wenfeng.,Qi, Ting.,Gao, Xike.,...&Liu, Yunqi.(2008).Unsymmetrical dendrimers as highly efficient light-emitting materials: Synthesis, photophysics, and electroluminescence.JOURNAL OF PHYSICAL CHEMISTRY C,112(34),13258-13263.
MLA	Zhang, Hengjun,et al."Unsymmetrical dendrimers as highly efficient light-emitting materials: Synthesis, photophysics, and electroluminescence".JOURNAL OF PHYSICAL CHEMISTRY C 112.34(2008):13258-13263.