The paper of Chihaya Adachi was published in "Applied Physics Letters"

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The paper of Prof. Chihaya Adachi (Principal Investigator, Hydrogen Production Research DivisionI2CNER / Project Leader, Center for Organic Photonics and Electronics Research (OPERA) ) and his research collaborators was published in “Applied Physics Letters” on Mar. 2, 2015.



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 () was significantly improved. A device with a narrow current injection width of 50 nm exhibited a  that was almost two orders of magnitude higher compared with that of the unpatterned OLED.



* 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