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Photo- and electroluminescence properties of fluorene-based copolymers containing electron- or hole-transporting unit
Sun, QJ; Zhan, XW; Yang, CH; Liu, YQ; Li, YF; Zhu, DB
2003-09-01
Source PublicationTHIN SOLID FILMS
ISSN0040-6090
Volume440Issue:1-2Pages:247-254
AbstractWe report the photophysical and electroluminescence (EL) properties of two fluorene-based copolymers, poly{[9,9-bis(2-ethylhexyl)fluorene-2,7-diyl]-alt-[6,6'- bis(3-phenylquinoxaline)-2,2'-diyl]} (Qx-PF) and poly{[9,9-bis(2- ethylhexyl)fluorene-2,7diyl]-alt-[N,N'-diphenyl-N,N'-bis(4-phenyl)-1,1'-biphenyl-4,4'-diamine]} (TPD-PF). The two copolymers in thin films show blue emission approximately 429-452 nm with relatively narrow bandwidth upon photoexcitation. Electroluminescence has been demonstrated using TPD-PF as the active polymer in the light-emitting electrochemical cell (LEC) with a turn-on voltage at 2.8 V and an EL efficiency of 0.002 cd/A. Due to the improved electron-transporting property, the Qx-PF-based LEC achieves the EL efficiency of 0.07 cd/A, 35 times higher than that of the TPD-PF-based device. Compared to the photoluminescence spectra, EL spectra show enhanced excimer emission, which is primarily related to self-heating of the devices during operation. The main process involved in the decrease of the light intensity during device operation is the electrochemical degradation of the polymer blend. (C) 2003 Elsevier Science B.V. All rights reserved.
KeywordLuminescence Polymers Electrochemistry Optoelectronic Devices
DOI10.1016/S0040-6090(03)00834-4
Indexed BySCI
Language英语
WOS IDWOS:000184951300036
PublisherELSEVIER SCIENCE SA
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80158
Collection中国科学院化学研究所
Corresponding AuthorLi, YF
Affiliation1.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Sun, QJ,Zhan, XW,Yang, CH,et al. Photo- and electroluminescence properties of fluorene-based copolymers containing electron- or hole-transporting unit[J]. THIN SOLID FILMS,2003,440(1-2):247-254.
APA Sun, QJ,Zhan, XW,Yang, CH,Liu, YQ,Li, YF,&Zhu, DB.(2003).Photo- and electroluminescence properties of fluorene-based copolymers containing electron- or hole-transporting unit.THIN SOLID FILMS,440(1-2),247-254.
MLA Sun, QJ,et al."Photo- and electroluminescence properties of fluorene-based copolymers containing electron- or hole-transporting unit".THIN SOLID FILMS 440.1-2(2003):247-254.
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