Analysis of the electrical and optical properties of PEDOT:PSS/PVA blends for low-cost and high-performance organic electronic and optoelectronic devices

Made available in DSpace on 2018-11-26T16:16:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-03-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) INEO nBioNet, Brazil In this study we propose the use of a blend, comprising poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) and polyvinyl alcohol (PVA), to be used as flexible, semitransparent and highly conductive material for electronic and optoelectronic devices. The electrical conductivity and optical transmittance of spray-deposited films of the blend, in different thicknesses and at different weight ratios, were studied in order to determine the most appropriate composition for optimal device performance and cost. We propose a direct method to determine the most appropriate blend composition to produce polymeric films with a desired sheet resistance, optical transmittance and cost, by using a diagram which considers the influence of blend composition and film thickness in a light-transmittance versus sheet resistance plot, mediated by the material cost per unit area. In this way, the present study establishes an empirical method to determine the PEDOT: PSS/PVA blend composition to be used as electrode material in optoelectronic devices which satisfies the desired conditions of optical transmittance, sheet resistance and cost-effectiveness. Univ Estadual Paulista UNESP, Dept Fis, BR-13506900 Rio Claro, Brazil Univ Estadual Paulista UNESP, Dept Fis, BR-15054000 Sao Jose Do Rio Preto, Brazil Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560250 Sao Carlos, SP, Brazil Univ Estadual Paulista UNESP, Dept Fis, BR-13506900 Rio Claro, Brazil Univ Estadual Paulista UNESP, Dept Fis, BR-15054000 Sao Jose Do Rio Preto, Brazil FAPESP: 2008/57706-4 FAPESP: 2012/19005-0 FAPESP: 2012/01624-5