Optical enhancement passivation layer CsCl for the transparent organic light emitted diodes with Sr/Ag transparent cathode

Chan Jae Lee, Duck Kyun Choi, Dae Gyu Moon, Jeong In Han

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

We researched a new transparent concept display, transparent organic light emitting diode (TOLED) with new transparent cathode, Sr/Ag double layer. Sr is used as an electron injection material and Ag is adopted as a protective material for Sr and electrical conductor. This cathode has high transmittance over 70% at 520nm and low sheet resistance, about 12Ω;/sq. We fabricated TOLED with two transparent electrodes, ITO and Sr/Ag. To improve device properties, transparent passivation layer, CsCl is deposited on transparent cathode. CsCl, passivation layer enhances the extraction of light emitting throughout the surface side of the TOLED by the improvement of transparency and the microcavity effect. TOLED without passivation layer shows the large difference of brightness as electrode, 26,700cd/m2 and 10,000 cd/m2 @14V through anode and cathode, respectively. However, CsCl makes to decrease difference between brightness through anode and cathode and come to similar brightness 20,600cd/m2 and 18,200cd/m2 @ 14V.

Original languageEnglish
Title of host publicationPhotonics, Devices, and Systems IV
DOIs
StatePublished - 2008
EventPhotonics, Devices, and Systems IV - Prague, Czech Republic
Duration: 27 Aug 200829 Aug 2008

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7138
ISSN (Print)0277-786X

Conference

ConferencePhotonics, Devices, and Systems IV
Country/TerritoryCzech Republic
CityPrague
Period27/08/0829/08/08

Keywords

  • Ag
  • Cathode
  • CsCl
  • Passivation
  • Sr
  • Transparent OLED

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