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dc.contributor.authorChang, WPen_US
dc.contributor.authorWhang, WTen_US
dc.date.accessioned2014-12-08T15:02:27Z-
dc.date.available2014-12-08T15:02:27Z-
dc.date.issued1996-08-01en_US
dc.identifier.issn0032-3861en_US
dc.identifier.urihttp://dx.doi.org/10.1016/0032-3861(96)00180-2en_US
dc.identifier.urihttp://hdl.handle.net/11536/1125-
dc.description.abstractA series of poly(p-phenylene vinylene) (PPV)-poly(vinyl alcohol) (PVA)-based polymers were prepared from the PPV precursor and PVA aqueous solution mixtures. The luminescence characteristics of the PPV-PVA-based polymers were dependent on their composition and the following treating conditions. The emitted light of the PPV-PVA-based light-emitting diodes (LEDs) shifted from yellow-green (550 nm) to blue (485 nm) as the PVA component increased. The infra-red (i.r.) absorption spectra showed that some part of the PPV precursor could react with PVA to form C-O-C linkages and interrupted the conjugation of PPV polymer chains. This resulted in decrease of the conjugated chain length, as evidenced in ultraviolet-visible u.v.-vis. absorption spectra. The relative photoluminescence (PL) intensity increases with decreasing the conjugated chain length. The relative electroluminescence (EL) decreases with the increase of the PVA component in the polymers. However, both PL and EL intensity normalized with PPV molar ratio of PPV-PVA-based polymers were higher than that of pure PPV. The relative low threshold voltage at 4-6 V was found in these PPV-PVA-based polymer LEDs with Al (negative) and indium-tin oxide ITO (positive) as the two electrodes. Copyright (C) 1996 Elsevier Science Ltd.en_US
dc.language.isoen_USen_US
dc.subjectelectroluminescenceen_US
dc.subjectPPV-PVA-based polymeren_US
dc.subjectlight emission efficiencyen_US
dc.subjectthreshold voltageen_US
dc.titleA study of the relationship between the electroluminescence characteristics and compositions of PPV-PVA-based polymersen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/0032-3861(96)00180-2en_US
dc.identifier.journalPOLYMERen_US
dc.citation.volume37en_US
dc.citation.issue16en_US
dc.citation.spage3493en_US
dc.citation.epage3499en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
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