Ferroelectric characteristics of MFIS structure with P(VDF–TrFE)/BaTiO3 nanocomposite as ferroelectric layer

Abstract

A metal-ferroelectric-insulator-semiconductor (MFIS) structure has been made using poly(vinylidene difluoride-trifluoroethylene)/barium titanate [P(VDF-TrFE)/ BaTiO 3 ] nanocomposite as ferroelectric layer, on silicon/ silicon dioxide (Si/SiO 2 ) substrate. Different concentrations of BaTiO 3 were added to P(VDF-TrFE) polymer using bath sonication method, and the films were prepared using spin coating method. The structure was annealed to 120°C for 2 h and then the top aluminium electrode was deposited by thermal evaporation method. Capacitancevoltage shows an increase in accumulation capacitance as the BaTiO 3 nanoparticle concentrations increases. Dielectric constant was estimated from the capacitance voltage (C-V) characteristics and found to be changing as the concentration of BaTiO 3 is varied. Polarization-electric field analyses show hysteresis behaviour of the nanocomposite. A comparison of MFIS and metal-ferroelectricsemiconductor structures was done with varying ferroelectric film thicknesses. All these results suggest that this polymer nanocomposite can be a promising material which can be used in non-volatile memory devices.

High‐performance P(VDF‐TrFE)/BaTiO3 nanocomposite based ferroelectric field effect transistor (FeFET) for memory and switching applications

“…P(VDF-TrFE) with 1% BaTiO 3 nanoparticle [P(VDF-TrFE)/BaTiO 3 polymer nanocomposite (PT-BT)] were prepared by 6 hours sonication and the same solution was used as ferroelectric layer for FeCAP and FeFET. [29,30] For the FeCAP fabrication, the p-type doped 2 in. silicon wafer (100) having a resistivity 1-5 Ωcm, were used as a substrate material.…”

“…The impact of BaTiO 3 nanoparticles (particle size less than 100 nm) over the ferroelectric properties of thin P(VDF-TrFE) films was reported in our previous works. [29,30] In this work, ferroelectric capacitor (FeCAP) devices were fabricated and characterized using P(VDF-TrFE),BaTiO 3 [PT-BT] polymer nanocomposite. In order to understand the effect of these polymer composite, capacitor devices with different dielectric stacks such as Al/Si/SiO 2 /PT-BT/Al, Al/Si/SiO 2 /Al, Al/Si/PT-BT/Al and Al/Si/SiO 2 /PT/Al were fabricated.…”