Inverted top-emitting organic light-emitting diodes using transparent conductive NiO electrode

Se W. Park, Jeong M. Choi, Eugene Kim, Seongil Im

Research output: Contribution to journalConference articlepeer-review

39 Citations (Scopus)


We report on a top-emitting organic light-emitting device (TE-OLED) using a thermally evaporated and semi-transparent NiO film as a top-electrode. Our TE-OLED was fabricated, basically taking the reverse sequence for the fabrication of a conventional bottom-emitting organic light-emitting device (BE-OLED). Since the resultant sheet resistance of our NiO was high (8 kΩ/□) and its transmittance was only 50%, the resulting luminance (∼150 cd/m 2 ) and injection current (∼50 mA/cm 2 ) of our TE-OLED were much inferior to those of the BE-OLED device. However, its top-emitting was clearly observable and is thus concluded that our TE-OLED using thermally evaporated NiO, is quite promising if the NiO is controlled to have lower sheet resistance than the present value.

Original languageEnglish
Pages (from-to)439-443
Number of pages5
JournalApplied Surface Science
Issue number1-4
Publication statusPublished - 2005 May 15
Event12th International Conference on Solid Films and Surfaces - Hammatsu, Japan
Duration: 2004 Jun 212004 Jun 25

Bibliographical note

Funding Information:
The authors are very appreciative of the financial support from KISTEP (Program no. M1-0214-00-0228) and YTCC (project year 2004). The authors also acknowledge the support from Brain Korea 21 Program.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


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