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

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.
Authors:
; ;  [1] ;  [1] ;  [2] ;  [3] ; ;  [4] ;  [1] ;  [2] ;  [3] ;  [5]
  1. Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395 (Japan)
  2. (Japan)
  3. (ISIT), 744 Motooka, Nishi, Fukuoka 819-0395 (Japan)
  4. Center for Polymers and Organic Solids, University of California, Santa Barbara, California 93106-9510 (United States)
  5. (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395 (Japan)
Publication Date:
OSTI Identifier:
22412774
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CHARGE DENSITY; COMPARATIVE EVALUATIONS; ELECTRIC CURRENTS; ELECTROLUMINESCENCE; ELECTRON BEAMS; EXCITONS; JOULE HEATING; LIGHT EMITTING DIODES; NANOSTRUCTURES; POLARONS