Topography of electrospun nanofibers and its influence on (POT/PS)/Si hybrid solar cell parameters

Abstract

Alignment nanofibers of poly(o-toluidine)/polystyrene (POT/PS) were prepared by using an electrospinningmethod at different applied voltages (Vappl.) of 10, 15, and 20 kV. The effect of the applied voltage on the morphology andelectrical properties of POT/PS nanofibers was studied. Morphology and diameters of the nanofibers were investigated viaatomic force microscopy. (POT/PS)/Si hybrid solar cells were fabricated through the deposition of POT/PS nanofiberson Si wafers using the electrospinning technique. The current-voltage measurements of the device under dark conditionsexhibited asymmetrical and rectifying behavior for the Al/(POT/PS)/Si/Al junction, thereby confirming the formationof diodes. Diode parameters, such as ideality factor n* and saturation current Io , were determined from the currentdensity-voltage curves. The photovoltaic properties of the Al/(POT/PS)/Si/Al junction were studied under illuminatedcondition. Results revealed short-circuit current density Jsc = 1.45 mA, open-circuit voltage Voc = 596 mV, and solarcell efficiency = 3.04.