Hybrid passivation for a film-like organic light-emitting diode using parylene and silicon dioxide

Sung Hoon Choi, Young Hwan Park, Chan Jae Lee, Dae Gyu Moon, Jungwon Kang, Myung Hwan Oh, Gee Keun Chang, Jeong In Han

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

A hybrid passivation method a using parylene and silicon dioxide combination layer for a film-like organic light-emitting diode (OLED) was applied on a polycarbonate substrate. Parylene coating by vapor polymerization is a highly effective passivation process for the OLED, and it is applied to the entire top surface and the edges of the OLED device. To minimize the permeation of moisture and oxygen from the top surface of the device, an additional layer of silicon dioxide was deposited over the parylene-coated layer. It was found that the water vapor transmittance rate (WVTR) of parylene (15 μm in thickness)/ SiO2 (0.3 μm in thickness) combination layers deposited on the polycarbonate film was decreased to less than 10-3 g/(m2·d). The OLED that had undergone hybrid passivation showed significantly longer lifetime characteristics in ambient conditions than the non-passivated OLED. The lifetime of the passivated OLED was 400h and it was more than ten times the lifetime of the conventional non-passivated OLED.

Original languageEnglish
Pages (from-to)810-814
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume46
Issue number2
DOIs
StatePublished - 8 Feb 2007

Keywords

  • OLED
  • Parylene
  • Thin-film passivation

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