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|Title:||Polyfluorene-based light-emitting diodes with an azide photocross-linked poly(3,4-ethylene dioxythiophene):(polystyrene sulfonic acid) hole-injecting layer||Authors:||Winroth, G.
|Issue Date:||2008||Citation:||Winroth, G., Latini, G., Credgington, D., Wong, L.-Y., Chua, L.-L., Ho, P.K.-H., Cacialli, F. (2008). Polyfluorene-based light-emitting diodes with an azide photocross-linked poly(3,4-ethylene dioxythiophene):(polystyrene sulfonic acid) hole-injecting layer. Applied Physics Letters 92 (10) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.2892685||Abstract:||We used a water-soluble bis(fluorinated phenyl azide) to cross-link a poly(ethylene dioxythiophene):poly(styrene sulphonic acid) (PEDOT:PSS), hole-injection layer, with a view to its future use with water-soluble emitters. To enable direct comparison with conventional PEDOT:PSS, we studied the cross-linked films in diodes incorporating the organic-solvent soluble polymer poly(9, 9′ -dioctylfluorene-alt-benzothiadiazole). Kelvin probe characterization of the PEDOT:PSS and electroabsorption measurements of the devices consistently show a 0.2 eV increase of the PEDOT:PSS work function upon cross-linking. We also observe a 70-fold reduction in resistivity, an increase of the current above threshold and a decrease of the "leakage" current below threshold. © 2008 American Institute of Physics.||Source Title:||Applied Physics Letters||URI:||http://scholarbank.nus.edu.sg/handle/10635/97565||ISSN:||00036951||DOI:||10.1063/1.2892685|
|Appears in Collections:||Staff Publications|
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