ICCAS OpenIR
Effects of electrode modifications on the performance of polymer light-emitting electrochemical cells
Sun, QJ; Yang, CH; He, GF; Li, YF; Wang, HQ
2003-07-04
Source PublicationSYNTHETIC METALS
ISSN0379-6779
Volume138Issue:3Pages:561-565
AbstractEffects of electrode modifications on the performance of polymer light-emitting electrochemical cells (LECs) were studied by measuring and comparing the current-luminance-voltage characteristics and the electroluminescence (EL) external quantum efficiency of the corresponding devices. A block copolymer of 2,5-dimethoxy-1,4-di(alpha-(2-naphthalene vinylene)benzene) and tri(ethylene oxide) (MDNVB-TEO) was used as the luminescent polymer in the LECs. Insertion of an ultrathin layer of barium at the polymer/cathode interface yields higher injection current and light intensity, lower threshold for light output, but lower device EL efficiency due to the doping of barium ions into the copolymer. With a conducting polymer layer of poly(ethylenedioxythiophene)-polystyrene sulfonate (PEDOT-PSS) on the indium-tin-oxide (ITO) anode, the operation stability and the lifetime of the LEC devices are significantly improved. However, the larger sheet resistance of the PEDOT-PSS layer results in lower injection current and light intensity, and higher threshold for light output. Oxygen-plasma treatment on the ITO anode increases the injection current and light intensity of the LECs. The threshold for the current injection consistently keeps unchanged for the LEC devices with and without the electrode modifications, which confirms the electrochemical doping mechanism of the LECs. (C) 2003 Elsevier Science B.V. All rights reserved.
KeywordElectrode Modifications Barium Pedot-pss Oxygen-plasma Polymer Light-emitting Electrochemical Cells
DOI10.1016/S0379-6779(02)01257-2
Indexed BySCI
Language英语
WOS IDWOS:000183851000026
PublisherELSEVIER SCIENCE SA
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80650
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.Beijing Univ Chem Engn, Sch Mat Sci & Engn, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Sun, QJ,Yang, CH,He, GF,et al. Effects of electrode modifications on the performance of polymer light-emitting electrochemical cells[J]. SYNTHETIC METALS,2003,138(3):561-565.
APA Sun, QJ,Yang, CH,He, GF,Li, YF,&Wang, HQ.(2003).Effects of electrode modifications on the performance of polymer light-emitting electrochemical cells.SYNTHETIC METALS,138(3),561-565.
MLA Sun, QJ,et al."Effects of electrode modifications on the performance of polymer light-emitting electrochemical cells".SYNTHETIC METALS 138.3(2003):561-565.
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