The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Dans un film déposé sous vide composé de molécules polaires organiques, des charges de polarisation apparaissent à la surface du film en raison de l'orientation spontanée de la molécule. Parce que sa densité (σpol) détermine un montant de charge d'accumulation (σselon) dans les diodes électroluminescentes organiques et la puissance de sortie des générateurs d'énergie vibratoire (VEG) polaires à base moléculaire, le contrôle de l'orientation moléculaire est hautement nécessaire. Récemment, plusieurs groupes ont rapporté que l'interaction dipôle-dipôle entre molécules polaires induit une orientation anti-parallèle qui ne contribue pas à σpol. En d’autres termes, une perturbation induisant l’atténuation de l’interaction dipolaire est nécessaire pour améliorer σpol. Dans cette étude, pour étudier un effet de l'irradiation lumineuse sur σpol, nous avons préparé un film de 1,3,5-tris(1-phényl-1H-benzimidazol-2-yl)benzène (TPBi) sous illumination lors de son dépôt et évalué le σselon dans un dispositif bicouche basé sur TPBi, ce qui est égal à σpol. Nous avons constaté que le σselon a été augmentée par l'irradiation lumineuse, indiquant que l'orientation moyenne du TPBi est améliorée. Ces résultats suggèrent que l'irradiation lumineuse pendant la fabrication des dispositifs est un processus prometteur pour les dispositifs électroniques organiques, notamment les VEG à base de molécules polaires.
Yuya TANAKA
Chiba University,PRESTO
Yuki TAZO
Chiba University
Hisao ISHII
Chiba University
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Yuya TANAKA, Yuki TAZO, Hisao ISHII, "Enhanced Orientation of 1,3,5-Tris(1-Phenyl-1H-Benzimidazole-2-yl)Benzene by Light Irradiation during Its Deposition Evaluated by Displacement Current Measurement" in IEICE TRANSACTIONS on Electronics,
vol. E104-C, no. 6, pp. 176-179, June 2021, doi: 10.1587/transele.2020OMS0009.
Abstract: In vacuum-deposited film composed of organic polar molecules, polarization charges appear on the film surface owing to spontaneous orientation of the molecule. Because its density (σpol) determines an amount of accumulation charge (σacc) in organic light-emitting diodes and output power in polar molecular-based vibrational energy generators (VEGs), control of molecular orientation is highly required. Recently, several groups have reported that dipole-dipole interaction between polar molecules induces anti-parallel orientation which does not contribute to σpol. In other words, perturbation inducing the attenuation of the dipole interaction is needed to enhance σpol. In this study, to investigate an effect of light irradiation on σpol, we prepared 1,3,5-tris(1-phenyl-1H-benzimidazol-2-yl)benzene (TPBi) film under illumination during its deposition, and evaluated the σacc in TPBi-based bilayer device, which equals to σpol. We found that the σacc was increased by light irradiation, indicating that average orientation of TPBi is enhanced. These results suggest that light irradiation during device fabrication is promising process for organic electronic devices including polar molecule-based VEGs.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2020OMS0009/_p
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@ARTICLE{e104-c_6_176,
author={Yuya TANAKA, Yuki TAZO, Hisao ISHII, },
journal={IEICE TRANSACTIONS on Electronics},
title={Enhanced Orientation of 1,3,5-Tris(1-Phenyl-1H-Benzimidazole-2-yl)Benzene by Light Irradiation during Its Deposition Evaluated by Displacement Current Measurement},
year={2021},
volume={E104-C},
number={6},
pages={176-179},
abstract={In vacuum-deposited film composed of organic polar molecules, polarization charges appear on the film surface owing to spontaneous orientation of the molecule. Because its density (σpol) determines an amount of accumulation charge (σacc) in organic light-emitting diodes and output power in polar molecular-based vibrational energy generators (VEGs), control of molecular orientation is highly required. Recently, several groups have reported that dipole-dipole interaction between polar molecules induces anti-parallel orientation which does not contribute to σpol. In other words, perturbation inducing the attenuation of the dipole interaction is needed to enhance σpol. In this study, to investigate an effect of light irradiation on σpol, we prepared 1,3,5-tris(1-phenyl-1H-benzimidazol-2-yl)benzene (TPBi) film under illumination during its deposition, and evaluated the σacc in TPBi-based bilayer device, which equals to σpol. We found that the σacc was increased by light irradiation, indicating that average orientation of TPBi is enhanced. These results suggest that light irradiation during device fabrication is promising process for organic electronic devices including polar molecule-based VEGs.},
keywords={},
doi={10.1587/transele.2020OMS0009},
ISSN={1745-1353},
month={June},}
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TY - JOUR
TI - Enhanced Orientation of 1,3,5-Tris(1-Phenyl-1H-Benzimidazole-2-yl)Benzene by Light Irradiation during Its Deposition Evaluated by Displacement Current Measurement
T2 - IEICE TRANSACTIONS on Electronics
SP - 176
EP - 179
AU - Yuya TANAKA
AU - Yuki TAZO
AU - Hisao ISHII
PY - 2021
DO - 10.1587/transele.2020OMS0009
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E104-C
IS - 6
JA - IEICE TRANSACTIONS on Electronics
Y1 - June 2021
AB - In vacuum-deposited film composed of organic polar molecules, polarization charges appear on the film surface owing to spontaneous orientation of the molecule. Because its density (σpol) determines an amount of accumulation charge (σacc) in organic light-emitting diodes and output power in polar molecular-based vibrational energy generators (VEGs), control of molecular orientation is highly required. Recently, several groups have reported that dipole-dipole interaction between polar molecules induces anti-parallel orientation which does not contribute to σpol. In other words, perturbation inducing the attenuation of the dipole interaction is needed to enhance σpol. In this study, to investigate an effect of light irradiation on σpol, we prepared 1,3,5-tris(1-phenyl-1H-benzimidazol-2-yl)benzene (TPBi) film under illumination during its deposition, and evaluated the σacc in TPBi-based bilayer device, which equals to σpol. We found that the σacc was increased by light irradiation, indicating that average orientation of TPBi is enhanced. These results suggest that light irradiation during device fabrication is promising process for organic electronic devices including polar molecule-based VEGs.
ER -