Surface preparation and characterization of indium tin oxide substrates for organic electroluminescent devices

Shu Kong SO*, W. K. Choi, C. H. Cheng, Louis M L LEUNG, C. F. Kwong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

197 Citations (Scopus)

Abstract

The cleanliness of indium tin oxide (ITO) substrates used in organic light-emitting diodes (OLEDs) is investigated by contact angle measurement and by X-ray photoemission spectroscopy (XPS). It was found that ultraviolet (UV) ozone treatment is quite effective in removing organic contamination on the ITO surface. The degree of surface contamination was checked by changes in contact angles and by XPS. Strong correlation can be established between these two techniques. OLEDs fabricated from UV-irradiated ITO substrates exhibit low turn-on voltage and superior brightness.

Original languageEnglish
Pages (from-to)447-450
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Volume68
Issue number4
DOIs
Publication statusPublished - Apr 1999

Scopus Subject Areas

  • Chemistry(all)
  • Materials Science(all)

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