| Paper Abstract and Keywords |
| Presentation |
2022-07-29 13:55
[Invited Talk]
Effect of light irradiation during deposition on accumulation charge and current efficiency in model OLEDs
Yuya Tanaka (Gunma Univ.), Yuki Tazo, Shin Shinohara, Hideyuki Kayaguchi, Naoya Abe, Keisuke Kurihara, Masahiro Ohara, Hisao Ishii (Chiba Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
When polar molecules such as tris-(8-hydroxyquinolinato)aluminium (Alq3) and 1,3,5-tris(1-phenyl-1H-benzimidazole-2-yl)benzene (TPBi), which are common materials for organic light-emitting diodes (OLEDs), are deposited by vacuum evaporation, the permanent dipoles spontaneously orient outward from the substrate surface. As a result, positive and negative polarization charges are formed on the surface and reverse sides of the film. In recent years, it has been found that the polarization charges affect not only charge injection and accumulation properties but also device performance, such as luminous efficiency and lifetime of the OLED. To understand the correlation between polarization charge and device characteristics in more detail, it is necessary to evaluate the behavior of charge in the device and the device performance while controlling the orientation of polar molecules. Recently, we found that OLED model devices' polarization charge and current efficiency increase when TPBi films are deposited under light irradiation. In this talk, we will discuss the mechanism of the improvement and introduce new applications of organic molecules showing spontaneous oriented polarization. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Organic Light-Emitting Diode / Energy Harvesting / Polar Molecule / Electret / Orientation Polarization / / / |
| Reference Info. |
ITE Tech. Rep., vol. 46, no. 22, IDY2022-24, pp. 13-16, July 2022. |
| Paper # |
IDY2022-24 |
| Date of Issue |
2022-07-22 (IDY) |
| ISSN |
Print edition: ISSN 1342-6893 Online edition: ISSN 2424-1970 |
| Download PDF |
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| Conference Information |
| Committee |
IDY IEICE-EID SID-JC |
| Conference Date |
2022-07-29 - 2022-07-29 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Online |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Information Display |
| Paper Information |
| Registration To |
IDY |
| Conference Code |
2022-07-IDY-EID-JC |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Effect of light irradiation during deposition on accumulation charge and current efficiency in model OLEDs |
| Sub Title (in English) |
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| Keyword(1) |
Organic Light-Emitting Diode |
| Keyword(2) |
Energy Harvesting |
| Keyword(3) |
Polar Molecule |
| Keyword(4) |
Electret |
| Keyword(5) |
Orientation Polarization |
| Keyword(6) |
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| Keyword(7) |
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| 1st Author's Name |
Yuya Tanaka |
| 1st Author's Affiliation |
Gunma University (Gunma Univ.) |
| 2nd Author's Name |
Yuki Tazo |
| 2nd Author's Affiliation |
Chiba University (Chiba Univ.) |
| 3rd Author's Name |
Shin Shinohara |
| 3rd Author's Affiliation |
Chiba University (Chiba Univ.) |
| 4th Author's Name |
Hideyuki Kayaguchi |
| 4th Author's Affiliation |
Chiba University (Chiba Univ.) |
| 5th Author's Name |
Naoya Abe |
| 5th Author's Affiliation |
Chiba University (Chiba Univ.) |
| 6th Author's Name |
Keisuke Kurihara |
| 6th Author's Affiliation |
Chiba University (Chiba Univ.) |
| 7th Author's Name |
Masahiro Ohara |
| 7th Author's Affiliation |
Chiba University (Chiba Univ.) |
| 8th Author's Name |
Hisao Ishii |
| 8th Author's Affiliation |
Chiba University (Chiba Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2022-07-29 13:55:00 |
| Presentation Time |
25 minutes |
| Registration for |
IDY |
| Paper # |
IDY2022-24 |
| Volume (vol) |
vol.46 |
| Number (no) |
no.22 |
| Page |
pp.13-16 |
| #Pages |
4 |
| Date of Issue |
2022-07-22 (IDY) |
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