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)

Abstract

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
Volume157
Issue number2
DOIs
Publication statusPublished - 2010 Jan 15

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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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