Characterization of Pyroelectric Thin-Films and Nano-Fibres for Effective Energy Harvesting from Solar Cells

Abstract

Energy harvesting from solar-cell with high efficiency has great attention from the last few decades. For this purpose, the addition of pyroelectric materials which have the ability of polarization with the change in temperature used as an interlayer between absorber and anti-reflection layer. Pyroelectric polymers can effectively improve the photovoltaic performance of solar cells. It can induce an electric field to promote the dissociation of electron-hole pairs, and the generated charge is collected from the opening. This enhancement in performance requires that the material have a unique crystal structure to polarize it at low energy. Multiple approaches are used to collect higher β-phase content, we herein assess a route to crystalline polyvinylidene fluoride (PVDF) electrospun nanofibers and thin-films based on electrospinning and spin coating method. The significant feature of the above method is that PVDF and blende of carbon black and PVDF are mixed into an acetone/DMF solution, and a thin film with high thermoelectric β phase content is prepared by Spin-coating and Electrospun. However, the characterization of electrospun nanofibers with FTIR and XRD shows that the crystallinity is significantly higher i.e. β-phase content. We find that the nanofibers prepared by electrospinning have more electroactive β-phase content than spin-coated films. Therefore, the organic pyroelectric nanofibers and thin films with controlled boundaries proposed in this study are very suitable for a wide scope of optoelectronic applications.