The suppression of viewing angle dependence of top emission organic light emitting diodes having strong microcavity characteristics by applying concave patterned anode

Nam Su Kim, Seon Hyeak Jung, Min Chul Suh

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In order to obtain the stable viewing angle characteristics of top emission organic light emitting diodes (TEOLEDs) having strong microcavity characteristics, we fabricated nano-porous film on the glass substrate before depositing highly reflective anode. And then, we could obtain the concave patterned anode by depositing anode on the nano-porous film and fabricated TEOLED composed of concave patterned layers. From this approach, we could successfully obtain not only the stable color shift and luminance distribution with viewing angle but also high efficiency caused by uneven morphology. In addition, we found that the driving voltage of TEOLED could be reduced due to increased surface area effect of the concave patterned anode, so that the power efficiency was enhanced by about 15% in comparison with reference device.

Original languageEnglish
Pages (from-to)79-84
Number of pages6
JournalJournal of the Society for Information Display
Volume26
Issue number2
DOIs
Publication statusPublished - 1 Feb 2018

Bibliographical note

Publisher Copyright:
© Copyright 2018 Society for Information Display

Keywords

  • TEOLED
  • concave electrode
  • nano-porous film
  • outcoupling enhancement
  • viewing angle dependence

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