How the surface energy of ultra-thin CuF2 film as anode buffer layer affect the organic light-emitting devices?

Yu Cheng Chen, Po Ching Kao, Ying Chien Fang, Hsin Hsuan Huang, Sheng Yuan Chu

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The effect of surface energy on organic light-emitting device performance was demonstrated by depositing an ultra-thin CuF2 buffer layer on indium tin oxide (ITO) substrates, followed by ultraviolet (UV)-ozone treatment. An optimal thickness UV-ozone treated CuF2 (4 nm)/ITO anode significantly improved device performance. Work function estimates from X-ray photoelectron measurements suggested that both pristine and UV-ozone treated CuF2/ITO anodes had no hole injection barrier. Measurements of energy band, surface energy and surface polarity indicated device improvement came from the simultaneous increase in work function and surface energy of ITO by adding treated CuF2 film between ITO and the hole-transporting layer.

Original languageEnglish
Article number263301
JournalApplied Physics Letters
Volume98
Issue number26
DOIs
Publication statusPublished - 2011 Jun 27

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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