Corona Poling Research Articles

Development of Turbocharging-Ability Hybrid Nanogenerators Comprising Bipolar PVDF-HFP/MXene Electrospun Composites.

Coupling piezo-active and triboelectric materials has recently emerged as an effective technique for developing high-performance hybrid nanogenerators (HNGs). This is the first paper to report the fabrication of piezo-active poly(vinylidene fluoride-hexafluoropropylene)(PVDF-HFP)/MXene-based hybrid composite fibers through conventional electrospinning. Here, the effect of MXene content (1-5%) on the surface potential and electrical performance of the as-synthesized composites is investigated and optimized. PVDF-HFP/3% MXene (PHM3)/Nylon 12+A-rGo (NY2)-HNG, which contains the best-performing composite (PMH3; containing 3% of MXene), exhibits turbocharging properties (charging a 10 µF capacitor with 16V within 100 s) and can continuously operate low-power electronics. Interestingly, PHM3 (with a negative surface potential) is transformed into PPHM3 (with a positive surface potential of +2190V) via corona poling. This study proposes a new class of HNGs containing frictional layers comprising bipolar PVDF-HFP/3% MXene composites (PHM3/PPHM3-HNG) with an excellent output performance of 297V and 5.1µA that exhibit broad application prospects in energy harvesting.

Giant piezoelectricity in fluoropolymer fiber mats achieved by corona poling in water

Giant piezoelectricity in fluoropolymer fiber mats achieved by corona poling in water

Ferroelectric ultrafiltration membrane with improved antifouling performance

Although membrane technologies for water purification have been widely applied over decades, membrane fouling remains an inherent challenge in the membrane filtration process. Improving the hydrophilicity or surface charge of the membrane is an effective approach to mitigate membrane fouling. Here, a ferroelectric composite ultrafiltration membrane was fabricated by incorporating dopamine modified BaTiO3 nanoparticles into poly(vinylidene fluoride) (PVDF) membranes and then charged by corona poling (p-BTO/PVDF). The water permeability of p-BTO/PVDF membrane (195.0 ± 10.5 L m-2 h−1 bar−1) was increased by 2.2 times compared to the pristine PVDF membrane. The enhanced hydrophilicity and surface potential based on ferroelectric charges promoted the formation of the hydration layer on the membrane surface and increased the electrostatic repulsion against the pollutants, thus decreasing the filtration resistance and enhancing the antifouling performance of the membrane. The water recovery efficiency of the ferroelectric membrane reached 98.2 %. Furthermore, the ferroelectric membrane showed excellent antifouling stability. This work proposes an effective and environmentally friendly strategy for using ferroelectric polarization to regulate membrane anti-fouling.

Enhanced Ferroelectric Polarization in Au@BaTiO3 Yolk-in-Shell Nanostructure for Synergistic Boosting Visible-Light- Piezocatalytic CO2 Reduction.

Developing efficient photo-piezocatalytic systems to achieve the conversion of renewable energy to chemical energy emerges enormous potential. However, poor catalytic efficiency remains a significant obstacle to future practical applications. Herein, a series of unique Au@BaTiO3 (Au@BT) yolk-shell nanostructure photo-piezocatalyst is constructed with single Au nanoparticle (Au NP) embedded in different positions within ferroelectric BaTiO3 hollow nanosphere (BT-HNS). This special structure showcases excellent mechanical force sensitivity and provides ample plasmon-induced interfacial charge-transfer pathways. In addition, the powerful piezoelectric polarization electric field induced by the enhanced ferroelectric polarization electric field via corona poling treatment in BT-HNS further promotes charge separation, CO2 adsorption and key intermediate conversion. Notably, BT with single Au NP encapsulated into hollow nanosphere shell with reinforced polarization (Au@BT-1-P) shows synergistically improved photo-piezocatalytic CO2 reduction activity for producing CO with a high production rate of 31.29 µmol g-1 h-1 under visible light irradiation and ultrasonic vibration. This work highlights a generic tactic for optimized design of high-performance and multifunctional nanostructured photo-piezocatalyst. Meanwhile, these yolk-in-shell nanostructures with single Au nanoparticle as an ideal model may hold great promise to inspire in-depth exploration of carrier dynamics and mechanistic understanding of the catalytic reaction.

Dual boosting of the built-in polarization field in the BiFeO3/ZnS heterostructure for water purification: Effects of Z-scheme heterostructure and corona poling

In this study, we have designed a novel 1D-0D lead-free Z-scheme heterostructure of BiFeO3–ZnS (BFO/ZnS) using an isoelectric point-assistant annealing method for piezocatalytic reactions. The open circuit voltage measurements exhibited a greater internal electric field for BFO/ZnS (90/10) than for individual components, causing its excellent piezocatalytic performance for MTZ antibiotics, organic dyes oxidation, and Cr(VI) reduction. BFO/ZnS (90/10) was treated by corona poling to boost its polarization, resulting in the highest remanent polarization and dielectric constant. Piezocatalytic experiments demonstrated that BFO/ZnS (90/10; poled) can degrade 99% of RhB by 9 min ultrasonic vibration with kapp = 0.44 min−1, which is 2.5, 5.5, and 16.3 times greater than those of BFO/ZnS (90/10), BFO, and ZnS, respectively. Also, the efficiency of piezodegradation for MTZ, Cr(VI), MO, and MB over BFO/ZnS (90/10; poled) was found to be 74.5% (90 min), 84.6% (60 min), 95.3% (40 min), and 97.2% (30 min), respectively. This outstanding piezocatalytic performance of BFO/ZnS (90/10; poled) is ascribed to the enhanced built-in polarization field due to the Z-scheme heterostructure and corona poling treatment. As supported by PL and EIS analysis, the stronger built-in electric field can effectively separate and transmit the charge carriers, causing excellent piezocatalytic activity.

Thick piezoelectric films by aerosol deposition at room temperature: corona poling and force sensing

In this study, we employed corona poling to improve the piezoelectric properties of as-deposited BaTiO3 films and conducted a vibration energy harvesting test. Dielectric measurements indicated that the dielectric constant of the as-deposited film increased with temperature, and the frequency dependence of the dielectric constant was minimal at room temperature. Applying an electric field of 1500 kV cm−1 resulted in a recoverable energy density of 7.1 J cm−3 and an energy storage efficiency of 54%. The corona polarization treatment could align dipoles under high electric fields and prevent dielectric breakdown owing to local defects created by the aerosol deposition (AD) process. The vibration test yielded a harvested energy of 172 nJ and an output voltage of 2.67 V, which is suitable for force sensor applications. Polarization via corona discharge is also feasible without an electrode. Integrating AD with corona poling may benefit new capacitors, sensors, and energy harvesting technologies.

Control of second-and third-order nonlinear optical properties of DCM and Znq2 composites fabricated by the physical vapor co-deposition process

In the present work, investigations on the second and third-order NLO properties of, 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM) reddye co-doped bis(8-hydroxyquinoline) Zinc (Znq2) thin films with different concentrations were investigated. The samples have a thickness of 100 nm. They were prepared using the physical vapor deposition (PVD) method under a high vacuum. The morphological properties were studied by atomic force microscopy. The second-order nonlinear susceptibility χ(2) after applying the corona poling technique was estimated using the comparative model of Lee, while the third-order nonlinear susceptibility χ(3) was estimated using the comparative model of Kubodera and Kobayashi. The tested samples varied in terms of the concentration of DCM in the structure, which visibly influenced their nonlinear response. The pure DCM thin film showed a large value of the second and third-order nonlinear susceptibility, while pure Znq2 had only the second harmonic response with a low value. In this study, we have demonstrated that doping with DCM, even with small concentrations, has also strongly enhanced the non-linearity of Znq2. The obtained results show that such compositions can be a good alternative for optoelectronic applications.

Multi-Objective Bayesian Optimization for Laminate-Inspired Mechanically Reinforced Piezoelectric Self-Powered Sensing Yarns.

Piezoelectric fiber yarns produced by electrospinning offer a versatile platform for intelligent devices, demonstrating mechanical durability and the ability to convert mechanical strain into electric signals. While conventional methods involve twisting a single poly(vinylidene fluoride-co-trifluoroethylene)(P(VDF-TrFE)) fiber mat to create yarns, by limiting control over the mechanical properties, an approach inspired by composite laminate design principles is proposed for strengthening. By stacking multiple electrospun mats in various sequences and twisting them into yarns, the mechanical properties of P(VDF-TrFE) yarn structures are efficiently optimized. By leveraging a multi-objective Bayesian optimization-based machine learning algorithm without imposing specific stacking restrictions, an optimal stacking sequence is determined that simultaneously enhances the ultimate tensile strength (UTS) and failure strain by considering the orientation angles of each aligned fiber mat as discrete design variables. The conditions on the Pareto front that achieve a balanced improvement in both the UTS and failure strain are identified. Additionally, applying corona poling induces extra dipole polarization in the yarn state, successfully fabricating mechanically robust and high-performance piezoelectric P(VDF-TrFE) yarns. Ultimately, the mechanically strengthened piezoelectric yarns demonstrate superior capabilities in self-powered sensing applications, particularly in challenging environments and sports scenarios, substantiating their potential for real-time signal detection.

Unveiling the Synergistic Role of Ferroelectric Polarization and Z‐Scheme Heterojunction in Bi2Fe4O9/Carbon‐Deficient g‐C3N4 for Enhanced Methylene Blue Degradation Efficiency

ABSTRACTEnhancing the efficiency of charge carrier separation is crucial for improving the performance of photocatalysts, thereby offering more effective solutions to energy and environmental pollution challenges. In this study, a carbon‐deficient ultra‐thin porous g‐C3N4 (Vc‐UPCN) was synthesized and subsequently was integrated with Bi2Fe4O9 (BFO) using a sonochemical self‐assembly technique, a Bi2Fe4O9/Vc‐UPCN (BC) photocatalyst featuring a Z‐scheme heterojunction. The BC catalyst was subjected to corona poling treatment to obtain BCp, which possesses an intrinsic electric field. Compared with pure BFO and Vc‐UPCN, the BC heterojunction exhibited higher photo‐generated electron–hole separation efficiency and photodegradation ability. Upon introduction of corona polarization, the photocatalytic performance of BC was further enhanced. Specifically, BCp‐15 (BFO/BC mass fraction = 15) achieved complete degradation of methylene blue (MB) within 30 min. BCp‐15 demonstrated that its degradation efficiency for MB was 1.28 times higher than that of BC‐15, 1.85 times higher than that of Vc‐UPCN, and impressive 7.69 times higher than that of pure BFO. The coupling effect of the heterojunction and ferroelectric polarization significantly improved the separation efficiency of photo‐generated carriers in BCp. This study is expected to provide a reference for the synergistic application of heterojunction and ferroelectric polarization in traditional semiconductor photocatalysis.

Bi6Fe2Ti3O18 ferroelectrics with various morphologies under mild conditions by crystal growth control for promoted adsorption-piezo-photocatalytic degradation performances

Bi6Fe2Ti3O18 (BFTO) Aurivillius phase layered perovskite ferroelectric materials with spontaneous polarization and piezoelectric effect, have garnered significant attention in photocatalysis owing to their unique advantage of enhancing electron-hole separation. Herein, morphological engineering is used to improve the photocatalytic, piezo-catalytic, and piezo-photocatalytic activities of BFTO, and BFTO nanocrystallites with diverse morphologies such as nanosheet, nanoparticle, nanosheets-assembled flower-like structures were successfully synthesized using a hydrothermal method under mild conditions. Among these structures, the flower-like BFTO sample exhibits efficient absorption of visible light, excellent adsorption performance, enhanced piezoelectric response, and effective carrier separation, thereby contributing to its superior adsorption-photocatalytic, adsorption-piezo-catalytic, and adsorption-piezo-photocatalytic activities for Rhodamine B. Furthermore, corona poling was further applied to enhance the macroscopic polarization and piezoelectric response of the BFTO photocatalyst, thereby leading to more effective separation of photogenerated carriers in the polarized samples. The polarized BFTO microflowers exhibit excellent photocatalytic, piezo-catalytic, and piezo-photocatalytic activities with reaction rate constants of 0.222 min−1, 0.168 min−1, and 0.255 min−1. Based on the results of piezoresponse force microscopy and finite element simulation, the greater piezoelectric response was confirmed in the polarized flower-like BFTO compared to the other samples. Overall, the synergistic effect of morphology control and polarization engineering is effective for achieving Bi-based Aurivillius phase layered perovskite photocatalyst with excellent adsorption-photocatalytic and adsorption-piezo-photocatalytic performances.

Enhanced polarization retention and softening in [001]-oriented Pb(Mg1/3Nb2/3)-PbTiO3 single crystals through corona poling

Enhanced polarization retention and softening in [001]-oriented Pb(Mg1/3Nb2/3)-PbTiO3 single crystals through corona poling

Controllable hierarchical Bi2MoO6 spheres with ferroelectric polarization enhanced photocatalytic efficiency

AbstractThe fast recombination of photogenerated electrons and holes remains a major issue in hindering photocatalytic efficiency. Apart from traditional methods, such as rare metal deposition and element doping, the introduction of a built‐in electric field has been proven an efficient way in recent years. Ferroelectrics, which possess spontaneous polarization and associated polarization electric fields, are attracting more attention as photocatalysts. In this study, Bi2MoO6 spheres with different hierarchical upper nanostructures are synthesized through a one‐pot hydrothermal method. With this porous structure and the intrinsic ferroelectricity, BMO spheres present excellent physisorption and photodegradation ability toward dye molecules. After corona poling treatment, the ferroelectric field of the BMO samples was enhanced, and the recombination of charges was suppressed, leading to an obvious increase in photocatalytic rate. The origin BMO‐5 can reach a total degradation of RhB in 20 min, and the polarized BMO‐5 (BMO‐5P) can remove all RhB molecules instantly through the physisorption process. Apart from BMO‐5, other samples also present excellent catalytic behavior. Origin BMO‐2 can fully degrade the RhB in 40 min, and the degradation time of polarized BMO‐2P is 30 min. The hierarchical structure and internal polarized electric field endow BMO spheres with outstanding adsorption purification and photodegradation ability and provide a new comprehensive strategy for the catalyst design.

Electret‐induced antibacterial response of Mg1‐xCaxSi1‐xZrxO3 (x = 0–0.4) bioceramics

AbstractThe potential risk of bacteria‐induced prosthetic infection during implantation/post‐operative healing raises a serious concern about the success of implant/surgery. In this context, the present study successfully established the antibacterial efficacy of the electret form of Mg1‐xCaxSi1‐xZrxO3 (x = 0, 0.1, 0.2, 0.3, 0.4 [MCSZO‐X]) bioceramics, toward both, Escherichia Coli and Staphylococcus aureus bacteria with reference to those of hydroxyapatite (HAP). MCSZO‐X bioceramics were synthesized using a solid‐state route. The influence of Ca‐ and Zr co‐doping on the crystallite size of MCSZO‐X has been analyzed using X‐ray peak profile analyses. The electrets were developed by corona poling of sintered MCSZO‐X samples at voltage and temperature of 20 kV and 500°C (30 min), respectively. The charge, stored on the surface of MCSZO‐X electret samples was calculated to be 0.253, 0.294, 0.320, 0.173, and 0.161 µC/cm2 via thermally stimulated depolarized current measurement. The positive and negative ends of MCSZO‐ X electrets exhibited a reduction in the viability of E. coli bacteria by (24%, 25%, 30%, 43%, and 42%) and (29%, 37%, 39%, 51%, and 48%), respectively, in comparison to those of HAP. On the contrary, the viability of S. aureus bacteria has decreased by (26%, 33%, 35%, 46%, and 42%) and (21%, 22%, 27%, 395, and 37%) on the surfaces of the positive and negative ends of MCSZO‐ X electrets, respectively, with the reference of those of HAP. The mechanism of electret‐induced antibacterial activity has been revealed via various assays, such as catalase activity, superoxide production (SOD), , protein estimation, and lipid peroxidation (LPO) assays. The positive ends of MCSZO‐X electrets demonstrate antibacterial efficacy by means of more reactive oxygen species generation as compared to their negative ends of electrets and uncharged surfaces of MCSZO‐X samples, as revealed by SOD, protein estimation, catalase activity, and LPO assays. However, the negative ends of electrets prevent the adhesion of bacterial cells via electrostatic repulsion.

Topography and Nonlinear Optical Properties of Thin Films Containing Iodide-Based Hybrid Perovskites.

This article covers selected properties of organic-inorganic thin films of hybrid perovskites with the summary formulas CH3NH3MI3, where M = Pb, Cd, Ge, Sn, Zn. The paper discusses not only the history, general structure, applications of perovskites and the basics of the theory of nonlinear optics, but also the results of experimental research on their structural, spectroscopic, and nonlinear optical properties. The samples used in all presented studies were prepared in the physical vapor deposition process by using co-deposition from two independent thermal sources containing the organic and inorganic parts of individual perovskites. Ultimately, thin layers with a thickness of the order of nanometers were obtained on glass and crystalline substrates. Their structural properties were characterized by atomic force microscopy imaging. Spectroscopic tests were used to confirm the tested films' transmission quality and determine previously unknown physical parameters, such as the absorption coefficient and refractive index. Experimental results of the nonlinear optical properties were obtained by studying the second and third harmonic generation processes and using initial sample polarization in the so-called Corona poling process. The obtained experimental results allowed us to determine the second- and third-order nonlinear optical susceptibility of the tested materials.

Enhanced Piezo‐photocatalytic Performances of AgNbO3 Materials for Dye Decomposition Via Polarization Engineering

AbstractThe limitation to enhancing photocatalytic performance in photocatalysts lies in the rapid recombination of photo‐induced electrons and holes. Herein, AgNbO3 photocatalysts were synthesized by the hydrothermal method. The effects of hydrothermal temperature on the microstructure and photocatalytic/piezo‐photocatalytic performances of AgNbO3 have been systematically investigated. The AgNbO3 cubes synthesized at 180 °C for 24 h exhibited the best photocatalytic/piezo‐photocatalytic performances among all samples. The corona poling as an important method of polarization engineering is applied to promote further the separation and migration of charge carriers in AgNbO3. The polarized AgNbO3 synthesized at 170 °C exhibited outstanding piezo‐photocatalytic performance, and a degradation rate of 95 % for RhB within 90 min and a high apparent rate constant of 0.02978 min−1 were achieved. On the one hand, the alternating piezoelectric field caused by ultrasonic‐assisted illumination destroyed the shielding effect and enhanced the separation of electron‐hole pairs. On the other hand, polarization engineering induced by corona poling promoted the separation and migration of photo‐induced carriers, thereby realizing more efficient utilization of these charges during the photocatalytic decomposition process. This work presents a facile way to achieve superior piezo‐photocatalytic performances of AgNbO3‐based photocatalyst via polarization engineering.

Ferroelectricity enhanced photocatalysis in Bi2WO6 ultra-thin nanosheets

The fast recombination of photo-induced electrons and holes have long been an obstacle in hampering the photocatalytic reaction rate. To mediate this issue, various modulation methods have been explored, including rare metal doping, morphology control and heterojunction construction. However, these methods can only facilitate the surface charge transfer. In recent years, internal electric field modulation has been attracting more and more attention, due to its utility in promoting the bulk charge separation and transportation. Semiconductors with ferroelectricity, which can build directional internal field, is believed to possess enhanced photocatalysis efficiency. In this study, Bi2WO6 (BWO) ultra-thin nanosheets with ferroelectricity have been synthesized through hydrothermal process. The morphology and size can be controlled via surfactant addition. After corona poling, the ferroelectric field can be further enhanced, providing more efficient facilitation of carrier separation and higher reaction efficiency. The photodegradation efficiency toward Rhodamine B (RhB) and methyl orange (MO) are tested, and the polarized BWO-30 and BWO-40 can reach a 100 % degradation of RhB in 5 min, which is significantly faster than origin samples, and superior to most non-precious metal catalysts. This work proves the applicable of ferroelectric enhancement in BWO nanosheets, providing novel tactic for future catalysts design.

Physical stimuli-emitting scaffolds: The role of piezoelectricity in tissue regeneration.

The imbalance between life expectancy and quality of life is increasing due to the raising prevalence of chronic diseases. Musculoskeletal disorders and chronic wounds affect a growing percentage of people and demand more efficient tools for regenerative medicine. Scaffolds that can better mimic the natural physical stimuli that tissues receive under healthy conditions and during healing may significantly aid the regeneration process. Shape, mechanical properties, pore size and interconnectivity have already been demonstrated to be relevant scaffold features that can determine cell adhesion and differentiation. Much less attention has been paid to scaffolds that can deliver more dynamic physical stimuli, such as electrical signals. Recent developments in the precise measurement of electrical fields in vivo have revealed their key role in cell movement (galvanotaxis), growth, activation of secondary cascades, and differentiation to different lineages in a variety of tissues, not just neural. Piezoelectric scaffolds can mimic the natural bioelectric potentials and gradients in an autonomous way by generating the electric stimuli themselves when subjected to mechanical loads or, if the patient or the tissue lacks mobility, ultrasound irradiation. This review provides an analysis on endogenous bioelectrical signals, recent developments on piezoelectric scaffolds for bone, cartilage, tendon and nerve regeneration, and their main outcomes in vivo. Wound healing with piezoelectric dressings is addressed in the last section with relevant examples of performance in animal models. Results evidence that a fine adjustment of material composition and processing (electrospinning, corona poling, 3D printing, annealing) provides scaffolds that act as true emitters of electrical stimuli that activate endogenous signaling pathways for more efficient and long-term tissue repair.

Molecular Structure, Computational Studies and Nonlinear Optical properties of a New Organic Chalcone Crystal

A new conjugated chalcone compound (Z)-2-(1-(1-(2,4-dimethylphenyl)-3-oxo-3-phenylprop-1-en-2-yl)pyridin-2(1H)ylidene) malononitrile was prepared and structurally analyzed using single-crystal X-ray diffraction. This new compound's quadratic and cubic susceptibilities at 1064 nm were analyzed and evaluated using the second and third harmonic generation methods after deposition in PMMA polymer thin films. These films have been used for the induced second harmonic generation measurements achieved using the corona poling technique. Complementary information on electric dipole moment, static dipole polarizability, and initial hyperpolarizability of this compound were obtained from the density functional theory (DFT) calculation performed at the DFT/B3LYP/6-311G++ (d, p) and Gaussian 09 software. The findings demonstrate that when compared to previous chalcone NLO crystals that have been published, the synthesized crystals had greater crystal transparency, polarizability, and π-conjugation. In particular, the (Z)-2-(1-(1-(2,4-dimethylphenyl)-3-oxo-3-phenylprop-1-en-2-yl)pyridin-2(1H)ylidene) malononitrile crystal's SHG and THG susceptibility are 0. 243 [pmV−1] and 41.13 10−22 [m2V−2], respectively. The combined findings demonstrate that the NLO properties depend only on the steric hindrance and the chemical structure, that is, the system of π-conjugated electrons.

Corona-poling enhanced photocatalytic degradation of methyl-violet and rhodamine B pollutants using ferroelectric nanoparticles

In this study, the effect of DC corona poling on the photocatalytic degradation response of conventional ferroelectric BaTiO3 nanoparticles over the methyl-violet and rhodamine B dyes has been investigated systematically. The BaTiO3 (BT) nanoparticles were synthesized via modified sol-gel route. The synthesized BT nanoparticles were characterized by using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) equipped with energy-dispersive X-ray spectroscopy (EDX), P-E hysteresis loop, impedance analyzer, photoluminescence spectroscopy and UV–vis spectroscopy. X-ray diffraction (XRD) and Raman spectroscopy confirmed the tetragonal phase of BT nanoparticles. The average particle size was found to be 130 ​nm as confirmed by SEM. The P-E hysteresis loop confirmed the ferroelectric nature of the sample and the Tc was observed nearly 130 ​°C as confirmed by dielectric study. The optical bandgap was found to be 3.74 ​eV and 3.49 ​eV for unpoled and poled samples, respectively. The degradation efficiency of the corona poled and unpoled BaTiO3 samples for the rhodamine dye solution was 45% and 25%, respectively, whereas it was 93% and 83% for methyl violet dye solution in 120 ​min under UV–vis light. The corona poling enhanced the alignment of electric dipoles in BaTiO3, which causes higher spatial charge separation, lowering the electron-hole recombination and hence improved the degradation efficiency.

Corona Poling Induced Phase Transition to Highly Polar Phase in P(VDF-TrFE-CFE) Dielectric and Charge Transport of Organic Field-Effect Transistors.

Increasing the number of charge carriers flowing through the charge transport channel to improve the electrical performance of organic field-effect transistors (OFETs) is important because it leads to a low driving voltage and a high drain current value. This paper proposes a new strategy, the corona poling process, to enhance the electrical performance of OFETs using an external electric field when forming a dielectric film using a PVDF-based high-k dielectric terpolymer, P(VDF-TrFE-CFE). A corona poling process was applied to align the dipoles with high-k dielectric molecules and improve the capacitance, thereby increasing the number of charge carriers. Through this process, by observing the phase transition of a PVDF dielectric through a corona poling process in the GIWAXS data, the phase transition through an external electric field was thoroughly revealed for the first time. As a result, the capacitance of high-k dielectric films can be improved, and the amount of charge carriers can be increased by a simple corona poling process. In addition, to reduce the effect of deep trap sites caused by the dipole alignment, a thin low-k dielectric, polystyrene (PS), was introduced between the active and high-k dielectric layers to provide trap site passivation, thereby increasing the electrical performance of the OFET. Therefore, through this strategy, using a diketopyrrolopyrrole (DPP)-based donor-acceptor (D-A) copolymer as an active material of OFET, the average saturation region hole mobility was improved from 0.34 to 0.60 cm2/Vs. Thus, the electrical performances of the OFETs were improved by enhancing the capacitance through the corona poling process and reducing the charge carrier trap sites introduced by the high-k and low-k bi-layer dielectric layer. Importantly, this work offers a new strategy for the post-treatment to improve electrical performance of organic devices.