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".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Pada permukaan tris-(8-hydroxyquinolate) aluminium (Alq) dan tris(7-propyl-8-hydroxyquinolinato) aluminium (Al7p) filem nipis, cas polarisasi positif dan negatif muncul, masing-masing, disebabkan oleh orientasi spontan molekul polar ini . Alq ialah bahan pengangkutan elektron biasa di mana elektron disuntik daripada katod. Oleh kerana cas polarisasi wujud pada antara muka Alq/katod, kemungkinan besar ia mempengaruhi proses suntikan elektron kerana interaksi Coulomb. Untuk menilai kesan caj polarisasi pada suntikan elektron daripada katod, peranti elektron sahaja (EOD) yang terdiri daripada Alq atau Al7p telah disediakan dan dinilai dengan pengukuran arus sesaran. Kami mendapati bahawa Alq-EOD mempunyai rintangan yang lebih rendah daripada Al7p-EOD, menunjukkan bahawa caj polarisasi positif pada antara muka Alq / katod meningkatkan suntikan elektron akibat tarikan Coulomb, manakala suntikan elektron ditindas oleh caj polarisasi negatif pada Al7p / Al antara muka. Keputusan ini jelas menunjukkan bahawa adalah perlu untuk mereka bentuk peranti semikonduktor organik dengan mengambil kira caj polarisasi.
Yuya TANAKA
Chiba University
Takahiro MAKINO
Chiba University
Hisao ISHII
Chiba University
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Salinan
Yuya TANAKA, Takahiro MAKINO, Hisao ISHII, "Influence of Polarity of Polarization Charge Induced by Spontaneous Orientation of Polar Molecules on Electron Injection in Organic Semiconductor Devices" in IEICE TRANSACTIONS on Electronics,
vol. E102-C, no. 2, pp. 172-175, February 2019, doi: 10.1587/transele.2018OMS0014.
Abstract: On surfaces of tris-(8-hydroxyquinolate) aluminum (Alq) and tris(7-propyl-8-hydroxyquinolinato) aluminum (Al7p) thin-films, positive and negative polarization charges appear, respectively, owing to spontaneous orientation of these polar molecules. Alq is a typical electron transport material where electrons are injected from cathode. Because the polarization charge exists at the Alq/cathode interface, it is likely that it affects the electron injection process because of Coulomb interaction. In order to evaluate an impact of polarization charge on electron injection from cathode, electron only devices (EODs) composed of Alq or Al7p were prepared and evaluated by displacement current measurement. We found that Alq-EOD has lower resistance than Al7p-EOD, indicating that the positive polarization charge at Alq/cathode interface enhances the electron injection due to Coulomb attraction, while the electron injection is suppressed by the negative polarization charge at the Al7p/Al interface. These results clearly suggest that it is necessary to design organic semiconductor devices by taking polarization charge into account.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2018OMS0014/_p
Salinan
@ARTICLE{e102-c_2_172,
author={Yuya TANAKA, Takahiro MAKINO, Hisao ISHII, },
journal={IEICE TRANSACTIONS on Electronics},
title={Influence of Polarity of Polarization Charge Induced by Spontaneous Orientation of Polar Molecules on Electron Injection in Organic Semiconductor Devices},
year={2019},
volume={E102-C},
number={2},
pages={172-175},
abstract={On surfaces of tris-(8-hydroxyquinolate) aluminum (Alq) and tris(7-propyl-8-hydroxyquinolinato) aluminum (Al7p) thin-films, positive and negative polarization charges appear, respectively, owing to spontaneous orientation of these polar molecules. Alq is a typical electron transport material where electrons are injected from cathode. Because the polarization charge exists at the Alq/cathode interface, it is likely that it affects the electron injection process because of Coulomb interaction. In order to evaluate an impact of polarization charge on electron injection from cathode, electron only devices (EODs) composed of Alq or Al7p were prepared and evaluated by displacement current measurement. We found that Alq-EOD has lower resistance than Al7p-EOD, indicating that the positive polarization charge at Alq/cathode interface enhances the electron injection due to Coulomb attraction, while the electron injection is suppressed by the negative polarization charge at the Al7p/Al interface. These results clearly suggest that it is necessary to design organic semiconductor devices by taking polarization charge into account.},
keywords={},
doi={10.1587/transele.2018OMS0014},
ISSN={1745-1353},
month={February},}
Salinan
TY - JOUR
TI - Influence of Polarity of Polarization Charge Induced by Spontaneous Orientation of Polar Molecules on Electron Injection in Organic Semiconductor Devices
T2 - IEICE TRANSACTIONS on Electronics
SP - 172
EP - 175
AU - Yuya TANAKA
AU - Takahiro MAKINO
AU - Hisao ISHII
PY - 2019
DO - 10.1587/transele.2018OMS0014
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E102-C
IS - 2
JA - IEICE TRANSACTIONS on Electronics
Y1 - February 2019
AB - On surfaces of tris-(8-hydroxyquinolate) aluminum (Alq) and tris(7-propyl-8-hydroxyquinolinato) aluminum (Al7p) thin-films, positive and negative polarization charges appear, respectively, owing to spontaneous orientation of these polar molecules. Alq is a typical electron transport material where electrons are injected from cathode. Because the polarization charge exists at the Alq/cathode interface, it is likely that it affects the electron injection process because of Coulomb interaction. In order to evaluate an impact of polarization charge on electron injection from cathode, electron only devices (EODs) composed of Alq or Al7p were prepared and evaluated by displacement current measurement. We found that Alq-EOD has lower resistance than Al7p-EOD, indicating that the positive polarization charge at Alq/cathode interface enhances the electron injection due to Coulomb attraction, while the electron injection is suppressed by the negative polarization charge at the Al7p/Al interface. These results clearly suggest that it is necessary to design organic semiconductor devices by taking polarization charge into account.
ER -