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

Journal Article · Mon Mar 02 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4913461· OSTI ID:22412774

Hayashi, Kyohei; Inoue, Munetomo; Yoshida, Kou ^[1]; Nakanotani, Hajime ^[1]; Mikhnenko, Oleksandr; Nguyen, Thuc-Quyen ^[2]; Adachi, Chihaya ^[1]

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1. Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395 (Japan)
2. Center for Polymers and Organic Solids, University of California, Santa Barbara, California 93106-9510 (United States)

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 (J{sub 0}) was significantly improved. A device with a narrow current injection width of 50 nm exhibited a J{sub 0} that was almost two orders of magnitude higher compared with that of the unpatterned OLED.

• OSTI ID: 22412774
• Journal Information: Applied Physics Letters, Vol. 106, Issue 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE DENSITY
COMPARATIVE EVALUATIONS
ELECTRIC CURRENTS
ELECTROLUMINESCENCE
ELECTRON BEAMS
EXCITONS
JOULE HEATING
LIGHT EMITTING DIODES
NANOSTRUCTURES
POLARONS