IEICE TRANSACTIONS on Electronics
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
Summary :
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.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E104-C No.6 pp.176-179
- Publication Date
- 2021/06/01
- Publicized
- 2020/12/08
- Online ISSN
- 1745-1353
- DOI
- 10.1587/transele.2020OMS0009
- Type of Manuscript
- BRIEF PAPER
- Category
Authors
Yuya TANAKA
Chiba University,PRESTO
Yuki TAZO
Chiba University
Hisao ISHII
Chiba University
Keyword
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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},}
Copy
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 -
English
