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Thin film passivation of organic light emitting diodes by inductively coupled plasma chemical vapor deposition

  • Han Ki Kim
  • , Sang Woo Kim
  • , Do Geun Kim
  • , Jae Wook Kang
  • , Myung Soo Kim
  • , Woon Jo Cho

Research output: Contribution to journalArticlepeer-review

Abstract

The characteristics of an SiNx passivation layer grown by a specially designed inductively coupled plasma chemical vapor deposition (ICP-CVD) system with straight antennas for the top-emitting organic light emitting diodes (TOLEDs) are investigated. Using a high-density plasma on the order of ∼ 1011 electrons/cm3 formed by nine straight antennas connected in parallel, a high-density SiNx passivation layer was deposited on a transparent Mg-Ag cathode at a substrate temperature of 40 °C. Even at a low substrate temperature, single SiNx passivation layer prepared by ICP-CVD showed a low water vapor transmission rate of 5 × 10- 2 g/m2/day and a transparency of ∼ 85% respectively. In addition, current-voltage-luminescence results of the TOLED passivated by the SiNx layer indicated that the electrical and optical properties of the TOLED were not affected by the high-density plasma during the SiNx deposition process.

Original languageEnglish
Pages (from-to)4758-4762
Number of pages5
JournalThin Solid Films
Volume515
Issue number11
DOIs
StatePublished - 9 Apr 2007
Externally publishedYes

Keywords

  • ICP-CVD
  • SiN
  • Straight antenna
  • TOLED

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