Efficiency improvement of top-emission organic light emitting diode by using UV-ozone, doped emission layer, and hole-blocking layer

Ying N. Lai, Wei Chou Hsu, Ching Sung Lee, Ching W. Wang, Chiu Sheng Ho, Tien Y. Lu, Wen Feng Lai

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4 Citations (Scopus)


This work investigates systematic approaches to improve the current efficiency of the devised top-emission organic light emitting diode (TOLED) with a UV-ozone-treated reflective Ag anode, doped emission layer, and hole-blocking layer. The work function of the Ag anode can be increased under the UV-ozone exposure to improve the current density-voltage property of TOLED. Yet, degraded sheet resistance and reflectance characteristics of the Ag anode are observed. Therefore, a trade-off to obtain optimum performance of the studied TOLED is investigated. Besides, structural design by doping 2,3,6,7-tetrahydro-1,1,7,7,- tetramethyl-1H,5H,11H-10-(2-benzothiazolyl)quinolizino-[9,9a,1gh]coumarin into the emission layer to improve the carrier recombination efficiency to obtain enhanced current efficiency is also studied.

Original languageEnglish
JournalJournal of the Electrochemical Society
Issue number2
Publication statusPublished - 2010 Jan 15


All Science Journal Classification (ASJC) codes

  • Electrochemistry
  • Renewable Energy, Sustainability and the Environment
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

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