Modulation of 2DEG in AlGaN/GaN heterostructures by P(VDF-TrFE)

Abstract

A nearly square-like ferroelectric hysteretic loop of spin-coated and crystallized poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) with a remnant polarization 2 Pr of 20 μC cm −2 was obtained. The electrical transport properties of the P(VDF-TrFE)/AlGaN/GaN structure were investigated. The results show that the carrier density N s , mobility μ, and resistivity ρ of AlGaN/GaN 2DEG can be directly and strongly modulated by an external electric field via the ferroelectric polymer P(VDF-TrFE): the N s , μ, and ρ of AlGaN/GaN 2DEG exhibit closed hysteretic loops under a closed external electric field and the carrier density can be tuned as large as 235% only by changing the external electric field.

AlGaN/GaN Metal-Oxide-Semiconductor High-Electron-Mobility Transistor with Polarized P(VDF-TrFE) Ferroelectric Polymer Gating

“…As shown in Ref. 26 and 27, the carrier density of AlGaN/GaN heterostructure with P(VDF-TrFE) or PZT can be significantly modulated by changing the external electric field. However, the effect of integrating P(VDF-TrFE) or PZT gating into AlGaN/GaN HEMTs (at a device level) has not been investigated so far.…”

“…At another front, it has been reported that a ferroelectric film, such as poly[(vinylidenefluoride-co-trifluoroethylene)] [P(VDF-TrFE)] and Pb(Zr, Ti)O 3 (PZT), with a large remnant polarization P r can modulate the 2-DEG density of the AlGaN/GaN heterostructure, without degrading the carrier transport within AlGaN/GaN heterostructure2627. As shown in Ref.…”

Construction of renewable biomass cardanol functionalized spherical nanoparticles achieving favorable interfacial interaction and thermostability in styrene butadiene rubber matrix

“…Previous studies have shown that the addition of cardanol and its derivatives can improve the mechanical properties of the material with the better thermal properties and anti‐aging properties 10–12 . Cardanol based plasticizers are applied in PVC and PLA fields, and the results showed the tensile strength and elongation at break of samples were significantly improved 13,14 . In addition, the interfacial compatibility between fillers and matrix became better with the filler dispersing more evenly through directly adding cardanol into rubber matrix 15,16 .…”

Poly‐cardanol as plasticizer and compatibilizer on styrene butadiene rubber with improved processability and silica dispersion

“…The functionalized XNBR has lower Mooney viscosity, lower plasticity number, and better processing properties compared to unmodified XNBR. Wang et al 22 also obtained a good rubber plasticizer by grafting cardanol (CA) with liquid polysoprene (LIR).…”