Research trend in thermally stimulated current method for development of materials and devices in Japan

Iwamoto, Mitsumasa; Taguchi, Dai

doi:10.7567/jjap.57.03ea04

Cited by 6 publications

(2 citation statements)

References 38 publications

(96 reference statements)

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“…Accordingly, Equation () and () indicate that the current source

I_{normals}

and internal conductance

G_{i}

increase at high temperatures, demonstrating good agreement with the I–V measurement results shown in Table 1. Note that various experimental methods are available for determination of the relaxation time τ ; these include the thermally stimulated current [ 25–27 ] and impedance measurement, [ 28–30 ] among others. These measurements will be helpful for investigating power generators based on dipolar polarization energy in terms of relaxation time.…”

Section: Resultsmentioning

confidence: 99%

Dipolar Energy as an Electrical Power Source: Dipole Rotation in Solids Enables a New Source for the Triboelectric Generator

Taguchi

Manaka

Iwamoto

2023

Physica Status Solidi (a)

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Herein, the concept of triboelectric generators using dipolar polarization energy as an electrical power source is introduced. Dipolar polarization energy is stored in dielectric films by rubbing, and is conveyed to external circuits for use during the depolarization process. Pyromellitic dianhydride‐4,4’‐oxydianiline polyimide films are used as a possible candidate for triboelectric generators, where polarization is formed by rubbing owing to the orientational alignment of polar molecular groups. The current–voltage measurements are used to evaluate the equivalent‐circuit parameters of the generator. The current source is 0.07 nA at 30 °C, which is enhanced to 0.13 nA at 110 °C. It is indicated in these results that the depolarization process proceeds in a short time at higher temperatures, causing an increase in the current. Consequently, the maximum power increases from 18 nW (30 °C) to 33 nW (110 °C). The enhancement of the output power at higher temperatures well supports the idea of using dipolar polarization energy as a power source of triboelectric generators.

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“…Accordingly, Equation () and () indicate that the current source

I_{normals}

and internal conductance

G_{i}

Section: Resultsmentioning

confidence: 99%

Dipolar Energy as an Electrical Power Source: Dipole Rotation in Solids Enables a New Source for the Triboelectric Generator

Taguchi

Manaka

Iwamoto

2023

Physica Status Solidi (a)

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“…TSC operates as short-circuit current that flows during heating due to the displacement of positive and negative charges (e.g., electrons, holes, ions) as well as to the rotational motion of permanent dipoles in samples, due to the phase transition of materials (e.g., the glass polarization phase, Curie point, etc.) [113].…”

Section: Thermally Stimulated Current (Tsc)mentioning

confidence: 99%

Properties of Nanogenerator Materials for Energy-Harvesting Application

Majid,

Ahmad,

Rosli

et al. 2023

J. Res. Updates Polym. Sci.

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Advancements in nanotechnology and materials science have led to the development of a variety of nanogenerator materials with improved properties, making energy harvesting technologies increasingly viable for various applications, such as powering wearable devices, remote sensors, and even small electronic gadgets in the future. The evolution of hybrid materials consisting of polymers and nanoparticles as efficient energy harvesters and energy storage devices is in high demand nowadays. Most investigations on organic ferroelectric P(VDF-TrFE) as a polymer host of polymer nanocomposite devices were primally focused on the β phase due to its excellent electrical properties for various application purposes. Nanofiller is also introduced into the polymer host to produce a polymer nanocomposite with enhanced properties. A brief description of various physical quantities related to ferroelectric, dielectric, pyroelectric effects and Thermally Stimulated Current (TSC) for energy harvesting applications in nanogenerator materials is presented. This article explores the different materials and uses of various nanogenerators. It explains the basics of the pyroelectric effect and the structure of pyroelectric nanogenerators (PNGs), as well as recent advancements in micro/nanoscale devices. Additionally, it discusses how the performance of ferroelectric, dielectric, pyroelectric, and TSC are impacted by the annealing treatment of P(VDF-TrFE) polymer.

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Discussion on hole traps of amorphous films of N,N′-di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine ( α- NPD) deposited at different substrate temperatures

Esaki

Matsushima

Adachi

2019

Applied Physics Letters

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The hole current in amorphous films of N,N′-di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine (α-NPD) strongly depends on substrate temperature during vacuum deposition (Tsub) and is the highest at a Tsub value of around 275 K. However, the reason for this enhancement of hole current at this Tsub is not clearly understood. In this study, we performed thermally stimulated current (TSC) measurements, which is a versatile method used to obtain information about carrier traps, on α-NPD films. The TSC results revealed that hole traps were uniformly distributed throughout the films and that hole traps were the shallowest for films fabricated at a Tsub value of around 275 K. Thus, the shallowest hole traps at this Tsub are believed to be one reason for the highest hole current for α-NPD films. This is the demonstration of how Tsub affects carrier traps, contributing to a better understanding of the underlying physics in organic amorphous films.

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Research trend in thermally stimulated current method for development of materials and devices in Japan

Cited by 6 publications

References 38 publications

Dipolar Energy as an Electrical Power Source: Dipole Rotation in Solids Enables a New Source for the Triboelectric Generator

Dipolar Energy as an Electrical Power Source: Dipole Rotation in Solids Enables a New Source for the Triboelectric Generator

Properties of Nanogenerator Materials for Energy-Harvesting Application

Discussion on hole traps of amorphous films of N,N′-di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine ( α- NPD) deposited at different substrate temperatures

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