Influence of Polypyrrole Incorporated Electrospun Poly(vinylidene fluoride-co-hexafluoropropylene) Nanofibrous Composite Membrane Electrolyte on the Photovoltaic Performance of Dye Sensitized Solar Cell

Vijayakumar Elayappan 1, 2

Vignesh Murugadoss 1

 Zhaofu Fei 3

Paul J. Dyson 3

Subramania Angaiah 1, Email

1 Electro-Materials Energy Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry - 605 014, India.

2 Department of Materials Science and Engineering,  Korea University, Seoul-02841, Republic of Korea.

3 Institut des Sciences et Ingenierie Chimiques, Ecole Polytechnique Federale de Lausanne (EPFL) CH-1015, Lausanne, Switzerland

Abstract

Electrospun Poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) nanofibrous composite membranes (esCPMs) incorporated with various wt% of polypyrrole (PPy) nanoparticles (1, 2, 3 and 4 wt%) were prepared by electrospinning technique for dye sensitized solar cell (DSSC) applications. The surface morphology, crystallinity, porosity and electrolyte uptake of the prepared esCPMs were examined. The esCPMs were soaked in an ionic liquid electrolyte containing 0.5M LiI, 0.05M I2, 0.5M 4-tert butyl pyridine and 0.5M 1-Butyl-3-methylimidazolium iodide in acetonitrile to get electrospun PVdF-HFP/PPy nanofibrous composite polymer membrane electrolytes (esCPMEs). The influence of PPy on ionic conductivity and electrocatalytic activity of esCPMEs were studied by electrochemical impedance and Tafel polarization measurements. The DSSC fabricated with esCPME (2wt% PPy) has the PCE of 7.02% at 100 mW cm-2, which is higher than that fabricated with the conventional electrospun PVdF-HFP membrane electrolyte (esPME).

Influence of Polypyrrole Incorporated Electrospun Poly(vinylidene fluoride-co-hexafluoropropylene) Nanofibrous Composite Membrane Electrolyte on the Photovoltaic Performance of Dye Sensitized Solar Cell