Stability improvement of organic light-emitting diode with aluminum cathode deposited by ion beam assisted deposition method

Soon Moon Jeong, Won Hoi Koo, Sang Hun Choi, Sung Jin Jo, Hong Koo Baik, Se Jong Lee, Kie Moon Song

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Highly stable organic electroluminescent devices based on spin-coated poly-p-phenylene-vynylene (PPV) thin films have been achieved. We investigated the electrical properties of ion beam assisted aluminum cathode contacting PPV compared that of thermal evaporation. Energetic particles of Al assisted by Ar+ ion increase the contact area between Al and PPV minimizing contact resistance. In addition, dense Al cathode inhibits the permeation of H2O and O2 through pinhole defects, which results in retarding dark spot growth. It is believed that the lifetime of organic light-emitting diode (OLED) device was enhanced effectively by ion beam assisted deposition process resulting from dense Al structure.

Original languageEnglish
Pages (from-to)227-230
Number of pages4
JournalThin Solid Films
Issue number1-2 SPEC. ISS.
Publication statusPublished - 2005 Mar 22


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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