Synthesis and characterization of new poly (cyanoterephthalylidene)s for light-emitting diodes
Liu, YQ; Yu, G; Li, QL; Zhu, DB
Source PublicationSYNTHETIC METALS
AbstractA serial of new polymers containing both long-chain alkoxy and cyano groups (C-n-CN-PPV) was synthesized using Knoevenagel reaction between the dialdehyde monomer and the appropriate diacetonitrile. The synthesized polymers were highly soluble in common organic solvents. The weight average molecular weights of the resulting polymers were in the range of 3900-4600 with uniform molecular polydispersity indexes range of 1.05-1.07. The decomposition temperatures and the glass transition temperatures were in the range of 395-410 and 174-198 degreesC, respectively. A quasi-reversible and stable electrochemical behavior for these polymers was observed in the reduction process. Their energy band gaps were calculated both by electrochemical measurement and optical measurement. The W-VIS absorption spectra of the present polymers showed absorption bands around 452 nm, and the photoluminescence spectra showed strong light emission at 560 nm in chloroform and at 611 nm as thin solid film. Electrical characterization of the LEDs with the structure of indium-tin oxide/ copper phthalocyanine/C-n-CN-PPV/Al exhibited a typical diode behavior with a moderate high rectification ratios greater than 10(2). Red light emission was achieved from these devices using the polymers as the emissive layer. (C) 2001 Elsevier Science B.V. All rights reserved.
KeywordPoly(Cyanoterephthalylidene)s Photoluminescence Electroluminescence Light-emitting Diodes
Indexed BySCI
WOS IDWOS:000169674100024
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Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLiu, YQ
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Liu, YQ,Yu, G,Li, QL,et al. Synthesis and characterization of new poly (cyanoterephthalylidene)s for light-emitting diodes[J]. SYNTHETIC METALS,2001,122(2):401-408.
APA Liu, YQ,Yu, G,Li, QL,&Zhu, DB.(2001).Synthesis and characterization of new poly (cyanoterephthalylidene)s for light-emitting diodes.SYNTHETIC METALS,122(2),401-408.
MLA Liu, YQ,et al."Synthesis and characterization of new poly (cyanoterephthalylidene)s for light-emitting diodes".SYNTHETIC METALS 122.2(2001):401-408.
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