Electrospun network structure for organic photovoltaic device

dc.contributor.authorKhanum, K.K.
dc.contributor.authorRamamurthy, P.C.
dc.date.accessioned2015-08-25T07:23:23Z
dc.date.available2015-08-25T07:23:23Z
dc.date.issued2015
dc.description.abstractPaper presented to the 3rd Southern African Solar Energy Conference, South Africa, 11-13 May, 2015.en_ZA
dc.description.abstractIn this paper, the enhancements in the light harvesting of photoactive materials by fabricating hierarchical structures were examined using electrospinning. Electrospinning due to ease of processing, has become an attractive technique for fabrication of polymer fibers ranging from sub-microns to few nanometers. Here we present a uniform network structure obtained by electrospinning of a conducting polymer blend; poly (3 hexyl thiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM). The study was carried out by varying the processing parameters like voltage applied, flow rate, tip-to-collector distance while solution concentrations, needle gauge, fabricating time were kept constant. Scanning electron microscopy and optical microscopy were used to evaluate the morphology changes with respect to varying processing conditions. The dictating parameters on the evolving structure were high voltage, tip to collector distance and solvent used. It was observed that there was an upper and lower limit to the voltage applied, and flow rate used, to get uniform network. Moving away from either of the limits leads to irregular deposition. Optical properties due to structured architecture showed enhancement in the internal reflection and in turn leading to higher light absorption. Opto-electrical characteristics of these devices showed higher order of response in comparison to standard film devices. This structure was evaluated for better light harvesting, and enhanced pathways for charge transportation as active layer architecture in an organic photovoltaic devices. Hence a step towards better light and charge management is possible by tuning the morphological structures of photoactive materials with optimized process parameters by electrospinning.en_ZA
dc.description.librariancf2015en_ZA
dc.format.extent4 pagesen_ZA
dc.format.mediumPDFen_ZA
dc.identifier.citationKhanum, K.K., & Ramamurthy, P.C. 2015, 'Electrospun network structure for organic photovoltaic device', Paper presented to the 3rd Southern African Solar Energy Conference, South Africa, 11-13 May, 2015.en_ZA
dc.identifier.urihttp://hdl.handle.net/2263/49494
dc.language.isoenen_ZA
dc.publisher3rd Southern African Solar Energy Conference, South Africa, 11-13 May, 2015.en_ZA
dc.rights© 2015 University of Pretoriaen_ZA
dc.subjectElectrospinningen_ZA
dc.subjectOrganic photovoltaic devicesen_ZA
dc.subjectPolymer fibersen_ZA
dc.subjectMorphology changesen_ZA
dc.subjectOptical propertiesen_ZA
dc.titleElectrospun network structure for organic photovoltaic deviceen_ZA
dc.typePresentationen_ZA

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