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Journal Articles

Electric power transmission in triboelectric generators activated through dipolar depolarization

Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 135, 245001 (2024)
https://doi.org/10.1063/5.0216915
Published: June 2024
View article titled, Electric power transmission in triboelectric generators activated through dipolar depolarization
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Journal Articles

Dipolar polarization as an energy source of tribo-electric power generator

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Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Applied Physics Letters
Appl. Phys. Lett. 119, 053302 (2021)
https://doi.org/10.1063/5.0058597
Published: August 2021
View article titled, Dipolar polarization as an energy source of tribo-electric power generator
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Journal Articles

Imaging of triboelectric charge distribution induced in polyimide film by using optical second-harmonic generation: Electronic charge distribution and dipole alignment

Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Applied Physics Letters
Appl. Phys. Lett. 114, 233301 (2019)
https://doi.org/10.1063/1.5094171
Published: June 2019
View article titled, Imaging of triboelectric charge distribution induced in polyimide film by using optical second-harmonic generation: Electronic charge distribution and dipole alignment
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Journal Articles

Modeling and analysis of I-V hysteresis behaviors caused by defects in tin perovskite thin films

Taishi Noma, Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 124, 175501 (2018)
https://doi.org/10.1063/1.5050557
Published: November 2018
View article titled, Modeling and analysis of I-V hysteresis behaviors caused by defects in tin perovskite thin films
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Journal Articles

Degradation analysis of AlGaN/GaN high electron mobility transistor by electroluminescence, electric field-induced optical second-harmonic generation, and photoluminescence imaging

Takashi Katsuno, Takaaki Manaka, Narumasa Soejima, Tsuyoshi Ishikawa, Mitsumasa Iwamoto
Journal: Applied Physics Letters
Appl. Phys. Lett. 113, 012106 (2018)
https://doi.org/10.1063/1.5019998
Published: July 2018
View article titled, Degradation analysis of AlGaN/GaN high electron mobility transistor by electroluminescence, electric field-induced optical second-harmonic generation, and photoluminescence imaging
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Journal Articles

Direct visualization of polarization reversal of organic ferroelectric memory transistor by using charge modulated reflectance imaging

Takako Otsuka, Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 122, 185501 (2017)
https://doi.org/10.1063/1.5004002
Published: November 2017
View article titled, Direct visualization of polarization reversal of organic ferroelectric memory transistor by using charge modulated reflectance imaging
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Journal Articles

Direct observation of trapped charges under field-plate in p-GaN gate AlGaN/GaN high electron mobility transistors by electric field-induced optical second-harmonic generation

Takashi Katsuno, Takaaki Manaka, Narumasa Soejima, Mitsumasa Iwamoto
Journal: Applied Physics Letters
Appl. Phys. Lett. 110, 092101 (2017)
https://doi.org/10.1063/1.4977084
Published: February 2017
View article titled, Direct observation of trapped charges under field-plate in p-GaN gate AlGaN/GaN high electron mobility transistors by electric field-induced optical second-harmonic generation
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Journal Articles

Study of carrier energetics in ITO/P(VDF-TrFE)/pentacene/Au diode by using electric-field-induced optical second harmonic generation measurement and charge modulation spectroscopy

Takako Otsuka, Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 121, 065501 (2017)
https://doi.org/10.1063/1.4975484
Published: February 2017
View article titled, Study of carrier energetics in ITO/P(VDF-TrFE)/pentacene/Au diode by using electric-field-induced optical second harmonic generation measurement and charge modulation spectroscopy
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Journal Articles

Three-dimensional current collapse imaging of AlGaN/GaN high electron mobility transistors by electric field-induced optical second-harmonic generation

Takashi Katsuno, Takaaki Manaka, Tsuyoshi Ishikawa, Narumasa Soejima, Tsutomu Uesugi, Mitsumasa Iwamoto
Journal: Applied Physics Letters
Appl. Phys. Lett. 109, 192102 (2016)
https://doi.org/10.1063/1.4967221
Published: November 2016
View article titled, Three-dimensional current collapse imaging of AlGaN/GaN high electron mobility transistors by electric field-induced optical second-harmonic generation
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Journal Articles

Observation of turnover of spontaneous polarization in ferroelectric layer of pentacene/poly-(vinylidene-trifluoroethylene) double-layer capacitor under photo illumination by optical second-harmonic generation measurement

Zhemin Shi, Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 119, 165502 (2016)
https://doi.org/10.1063/1.4947584
Published: April 2016
View article titled, Observation of turnover of spontaneous polarization in ferroelectric layer of pentacene/poly-(vinylidene-trifluoroethylene) double-layer capacitor under photo illumination by optical second-harmonic generation measurement
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Journal Articles

Analysis of current-voltage characteristics of Au/pentacene/fluorine polymer/indium zinc oxide diodes by electric-field-induced optical second-harmonic generation

Shohei Nishi, Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 117, 245502 (2015)
https://doi.org/10.1063/1.4923058
Published: June 2015
View article titled, Analysis of current-voltage characteristics of Au/pentacene/fluorine polymer/indium zinc oxide diodes by electric-field-induced optical second-harmonic generation
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Journal Articles

Charge injection and accumulation in organic light-emitting diode with PEDOT:PSS anode

Martin Weis, Takako Otsuka, Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 117, 155503 (2015)
https://doi.org/10.1063/1.4918556
Published: April 2015
View article titled, Charge injection and accumulation in organic light-emitting diode with PEDOT:PSS anode
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Journal Articles

Current collapse imaging of Schottky gate AlGaN/GaN high electron mobility transistors by electric field-induced optical second-harmonic generation measurement

Takashi Katsuno, Takaaki Manaka, Tsuyoshi Ishikawa, Hiroyuki Ueda, Tsutomu Uesugi, Mitsumasa Iwamoto
Journal: Applied Physics Letters
Appl. Phys. Lett. 104, 252112 (2014)
https://doi.org/10.1063/1.4885838
Published: June 2014
View article titled, Current collapse imaging of Schottky gate AlGaN/GaN high electron mobility transistors by electric field-induced optical second-harmonic generation measurement
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Journal Articles

Selective observation of photo-induced electric fields inside different material components in bulk-heterojunction organic solar cell

Xiangyu Chen, Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Applied Physics Letters
Appl. Phys. Lett. 104, 013306 (2014)
https://doi.org/10.1063/1.4861620
Published: January 2014
View article titled, Selective observation of photo-induced electric fields inside different material components in bulk-heterojunction organic solar cell
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Journal Articles

Analysis of carrier behavior in C60/P(VDF-TrFE) double-layer capacitor by using electric-field-induced optical second-harmonic generation measurement

Xiaojin Cui, Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 114, 234504 (2013)
https://doi.org/10.1063/1.4853035
Published: December 2013
View article titled, Analysis of carrier behavior in C60/P(VDF-TrFE) double-layer capacitor by using electric-field-induced optical second-harmonic generation measurement
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Journal Articles

Master equation model for Gaussian disordered organic field-effect transistors

Fei Liu, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 114, 074502 (2013)
https://doi.org/10.1063/1.4818497
Published: August 2013
View article titled, Master equation model for Gaussian disordered organic field-effect transistors
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Journal Articles

The Maxwell-Wagner model for charge transport in ambipolar organic field-effect transistors: The role of zero-potential position

Yasuhiro Mashiko, Dai Taguchi, Martin Weis, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Applied Physics Letters
Appl. Phys. Lett. 101, 243302 (2012)
https://doi.org/10.1063/1.4771989
Published: December 2012
View article titled, The Maxwell-Wagner model for charge transport in ambipolar organic field-effect transistors: The role of zero-potential position
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Journal Articles

Probing interfacial charge accumulation in ITO/α-NPD/Alq3/Al diodes under two electroluminescence operational modes by electric-field induced optical second-harmonic generation

Atsuo Sadakata, Kenshiro Osada, Dai Taguchi, Tetsuya Yamamoto, Masahiro Fukuzawa, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 112, 083723 (2012)
https://doi.org/10.1063/1.4762014
Published: October 2012
View article titled, Probing interfacial charge accumulation in ITO/α-NPD/Alq<sub>3</sub>/Al diodes under two electroluminescence operational modes by electric-field induced optical second-harmonic generation
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Journal Articles

Analyzing photo-induced interfacial charging in IZO/pentacene/C60/bathocuproine/Al organic solar cells by electric-field-induced optical second-harmonic generation measurement

Xiangyu Chen, Dai Taguchi, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 111, 113711 (2012)
https://doi.org/10.1063/1.4728225
Published: June 2012
View article titled, Analyzing photo-induced interfacial charging in IZO/pentacene/C<sub>60</sub>/bathocuproine/Al organic solar cells by electric-field-induced optical second-harmonic generation measurement
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Journal Articles

Conservation of the injection and transit time ratio in organic field-effect transistors: A thermally accelerated aging study

Keanchuan Lee, Martin Weis, Takaaki Manaka, Mitsumasa Iwamoto
Journal: Journal of Applied Physics
J. Appl. Phys. 111, 104505 (2012)
https://doi.org/10.1063/1.4719970
Published: May 2012
View article titled, Conservation of the injection and transit time ratio in organic field-effect transistors: A thermally accelerated aging study
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