Investigation of time-dependent UV-ozone treatment on an ultra-thin AgF buffer layer for organic light-emitting diodes

Yu Cheng Chen, Yung Der Juang, Sheng-Yuan Chu, Po Ching Kao

研究成果: Article同行評審

6 引文 斯高帕斯(Scopus)

摘要

The effect of ultraviolet (UV)-ozone treatment on an ultrathin AgF buffer layer deposited on indium tin oxide (ITO) substrate was studied for various layer thicknesses and treatment times. Work function was estimated from X-ray photoelectron spectroscopy, and surface properties were calculated from measured contact angles using H 2O and CH 2I 2 as test liquids. With improper UV-ozone treating times, no luminance was induced by current at a low voltage due to the resonant tunneling effect or a damaged film surface. However, the surface energy, surface polarity and work function were increased by proper treatment of the ultra-thin AgF film, and the resonant tunneling effect was simultaneously eliminated, resulting in improvement in device performance. An optimal thickness AgF (2 nm) with proper UV-ozone treatment time (1 min) significantly improved device performance (ITO/AgF/NPB/Alq 3LiF/Al). Our results indicate that the device efficiency of OLEDs can be greatly enhanced by simultaneous control of AgF film thickness and UV-ozone exposure time.

原文English
期刊Journal of the Electrochemical Society
159
發行號4
DOIs
出版狀態Published - 2012 二月 29

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 可再生能源、永續發展與環境
  • 凝聚態物理學
  • 表面、塗料和薄膜
  • 電化學
  • 材料化學

指紋

深入研究「Investigation of time-dependent UV-ozone treatment on an ultra-thin AgF buffer layer for organic light-emitting diodes」主題。共同形成了獨特的指紋。

引用此