九州大学カーボンニュートラル・エネルギー国際研究所主任研究者及び最先端有機光エレクトロニクスセンター長の安達千波矢教授（水素製造研究部門）の研究グループの研究成果が、2015年3月2日の『Applied Physics Letters』に掲載されました。

■概要

Using e-beam nanolithography, the current injection/transport area in organic light-emitting diodes(OLEDs) was confined into a narrow linear structure with a minimum width of 50 nm. This caused suppression of Joule heating and partial separation of polarons and excitons, so the charge density where the electroluminescent efficiency decays to the half of the initial value (J0) was significantly improved. A device with a narrow current injection width of 50 nm exhibited a J0 that was almost two orders of magnitude higher compared with that of the unpatterned OLED.

■論文

* Title: Suppression of roll-off characteristics of organic light-emitting diodes by narrowing current injection/transport area to 50 nm

* Authors: Kyohei Hayashi, Hajime Nakanotani, Munetomo Inoue, Kou Yoshida, Oleksandr Mikhnenko, Thuc-Quyen Nguyen andChihaya Adachi

* DOI: 10.1063/1.4913461

* Published Online: Mar. 2, 2015