Probing Internal Electric Field in Organic Photoconductors by Using Electric-Field-Induced Optical Second-Harmonic Generation

Dai TAGUCHI; Takaaki MANAKA; Mitsumasa IWAMOTO; Kazuko SAKUMA; Kaname WATARIGUCHI; Masataka KAWAHARA

doi:10.1587/transele.2018OMP0002

Probing Internal Electric Field in Organic Photoconductors by Using Electric-Field-Induced Optical Second-Harmonic Generation

Dai TAGUCHI, Takaaki MANAKA, Mitsumasa IWAMOTO, Kazuko SAKUMA, Kaname WATARIGUCHI, Masataka KAWAHARA

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Organic photoconductors (OPC) have been an important research and development topics for high quality electrophotography. By using electric field induced optical second harmonic generation (EFISHG) measurement, we can probe carrier processes in electrophotographic processes such as photo carrier generation, carrier separation, and carrier transportation for copier image production. We here selectively probe charge generation and accumulation in charge generation layer and charge transport layer in multilayer structure OPCs. We studied charge accumulation in OPC under illumination (wavelength 635nm) of double-layer-type OPC with structure of hole transport layer coated on charge generation layer. The result showed that light absorption efficiently produces free holes and electrons in the charge generation layer, followed by excessive hole accumulation at the CG/CT interface due to photo-conducting effect of CG layer. The short-wavelength irradiation at 405nm induced photovoltaic effect. These results demonstrated that the EFISHG measurement is useful to selectively probe carrier process in one layer of the multilayer OPC and to the discussion of carrier process for electrophotographic image productions.

Publication: IEICE TRANSACTIONS on Electronics Vol.E102-C No.2 pp.113-118

Publication Date: 2019/02/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1587/transele.2018OMP0002

Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Organic Molecular Electronics and Biotechnology)

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Authors

Dai TAGUCHI
  Tokyo Institute of Technology
Takaaki MANAKA
  Tokyo Institute of Technology
Mitsumasa IWAMOTO
  Tokyo Institute of Technology
Kazuko SAKUMA
  Canon Inc.
Kaname WATARIGUCHI
  Canon Inc.
Masataka KAWAHARA
  Canon Inc.

Keyword

electric-field-induced optical second-harmonic generation, organic photoconductor, internal electric field, photo-conducting effect, photovoltaic effect

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Dai TAGUCHI, Takaaki MANAKA, Mitsumasa IWAMOTO, Kazuko SAKUMA, Kaname WATARIGUCHI, Masataka KAWAHARA, "Probing Internal Electric Field in Organic Photoconductors by Using Electric-Field-Induced Optical Second-Harmonic Generation" in IEICE TRANSACTIONS on Electronics, vol. E102-C, no. 2, pp. 113-118, February 2019, doi: 10.1587/transele.2018OMP0002.
Abstract: Organic photoconductors (OPC) have been an important research and development topics for high quality electrophotography. By using electric field induced optical second harmonic generation (EFISHG) measurement, we can probe carrier processes in electrophotographic processes such as photo carrier generation, carrier separation, and carrier transportation for copier image production. We here selectively probe charge generation and accumulation in charge generation layer and charge transport layer in multilayer structure OPCs. We studied charge accumulation in OPC under illumination (wavelength 635nm) of double-layer-type OPC with structure of hole transport layer coated on charge generation layer. The result showed that light absorption efficiently produces free holes and electrons in the charge generation layer, followed by excessive hole accumulation at the CG/CT interface due to photo-conducting effect of CG layer. The short-wavelength irradiation at 405nm induced photovoltaic effect. These results demonstrated that the EFISHG measurement is useful to selectively probe carrier process in one layer of the multilayer OPC and to the discussion of carrier process for electrophotographic image productions.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2018OMP0002/_p

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@ARTICLE{e102-c_2_113,
author={Dai TAGUCHI, Takaaki MANAKA, Mitsumasa IWAMOTO, Kazuko SAKUMA, Kaname WATARIGUCHI, Masataka KAWAHARA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Probing Internal Electric Field in Organic Photoconductors by Using Electric-Field-Induced Optical Second-Harmonic Generation},
year={2019},
volume={E102-C},
number={2},
pages={113-118},
abstract={Organic photoconductors (OPC) have been an important research and development topics for high quality electrophotography. By using electric field induced optical second harmonic generation (EFISHG) measurement, we can probe carrier processes in electrophotographic processes such as photo carrier generation, carrier separation, and carrier transportation for copier image production. We here selectively probe charge generation and accumulation in charge generation layer and charge transport layer in multilayer structure OPCs. We studied charge accumulation in OPC under illumination (wavelength 635nm) of double-layer-type OPC with structure of hole transport layer coated on charge generation layer. The result showed that light absorption efficiently produces free holes and electrons in the charge generation layer, followed by excessive hole accumulation at the CG/CT interface due to photo-conducting effect of CG layer. The short-wavelength irradiation at 405nm induced photovoltaic effect. These results demonstrated that the EFISHG measurement is useful to selectively probe carrier process in one layer of the multilayer OPC and to the discussion of carrier process for electrophotographic image productions.},
keywords={},
doi={10.1587/transele.2018OMP0002},
ISSN={1745-1353},
month={February},}

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TY - JOUR
TI - Probing Internal Electric Field in Organic Photoconductors by Using Electric-Field-Induced Optical Second-Harmonic Generation
T2 - IEICE TRANSACTIONS on Electronics
SP - 113
EP - 118
AU - Dai TAGUCHI
AU - Takaaki MANAKA
AU - Mitsumasa IWAMOTO
AU - Kazuko SAKUMA
AU - Kaname WATARIGUCHI
AU - Masataka KAWAHARA
PY - 2019
DO - 10.1587/transele.2018OMP0002
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E102-C
IS - 2
JA - IEICE TRANSACTIONS on Electronics
Y1 - February 2019
AB - Organic photoconductors (OPC) have been an important research and development topics for high quality electrophotography. By using electric field induced optical second harmonic generation (EFISHG) measurement, we can probe carrier processes in electrophotographic processes such as photo carrier generation, carrier separation, and carrier transportation for copier image production. We here selectively probe charge generation and accumulation in charge generation layer and charge transport layer in multilayer structure OPCs. We studied charge accumulation in OPC under illumination (wavelength 635nm) of double-layer-type OPC with structure of hole transport layer coated on charge generation layer. The result showed that light absorption efficiently produces free holes and electrons in the charge generation layer, followed by excessive hole accumulation at the CG/CT interface due to photo-conducting effect of CG layer. The short-wavelength irradiation at 405nm induced photovoltaic effect. These results demonstrated that the EFISHG measurement is useful to selectively probe carrier process in one layer of the multilayer OPC and to the discussion of carrier process for electrophotographic image productions.
ER -