ICCAS OpenIR
Unsymmetrical dendrimers as highly efficient light-emitting materials: Synthesis, photophysics, and electroluminescence
Zhang, Hengjun1,2; Xu, Xinjun1,2; Qiu, Wenfeng1; Qi, Ting1,2; Gao, Xike1,2; Liu, Ying1,2; Lu, Kun1,2; Du, Chunyan1,2; Yu, Gui1; Liu, Yunqi1
2008-08-28
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
Volume112Issue:34Pages:13258-13263
AbstractHighly 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.
DOI10.1021/jp801613v
Indexed BySCI
Language英语
WOS IDWOS:000258633600032
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63400
Collection中国科学院化学研究所
Corresponding AuthorLiu, Yunqi
Affiliation1.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
Recommended Citation
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.
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