Surface potential behaviors of UV treated of Ag anode for high-performance T-OLED by nanotribology

Soo In Kim, Hwan Won Oh, Jin Woo Huh, Byeongkwon Ju, Chang Woo Lee

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


A high reflective bottom anode is essential for high-performance top-emitting organic light emitting devices (OLEDs). Ag has high reflectivity for visible light but its electronic properties are not ideal for anodes of OLEDs. Thus, we investigated the UV treatment effect of Ag film with a thin silver oxide layer at the surface for application of top-emitting OLEDs. In this study, we measured the change of potential difference between Ag film and ITO (indium tin oxide) films, according to UV treatment time and the mechanical properties by KPFM (Kelvin Probe Force Microscope) method and nano-indenter system, respectively. The KPFM and nano-indenter results show that the differences of surface potential and surface volume change according to UV treatment time.

Original languageEnglish
Pages (from-to)6872-6875
Number of pages4
JournalThin Solid Films
Issue number20
Publication statusPublished - 2011 Aug 1

Bibliographical note

Funding Information:
This work was supported by research program 2010 of Kookmin University in Korea.


  • Ag anode
  • Indium tin oxide (ITO)
  • KPFM (Kelvin Probe Force Microscope)
  • Nano-indenter
  • Nanotribology
  • OLED
  • UV treatment
  • Work function

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry


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