A quick operating organic EL device using Ru complex light-emitting layer with 2,5-bis(4-tert-butyl-2-benz-oxazolyl) thiophene electron transport layer

Seimei Shiratori

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Recently, solid-state light-emitting devices based on small molecules such as Ru(bpy)3(PF6)2 and its derivatives attracted attention as electro luminescence (EL) materials because the luminance shows as high as l600 cd m-2 at only 5 V with spin-cast films in air without sealing the devices. Devices based on these materials operate at low voltage (2.5-5 V), however, response of light emission after applying voltage is rather slow, suggesting a similar mechanism with liquid electro-generated chemiluminescence (ECL) cells. In this paper, we added thin electron transporting layer, 2,5-bis(5-tert-butyl-2-benz-oxazolyl) thiophene (BBOT) film (ca. 200 nm) between Ru complex light-emitting layer and Al electrode. As a result, much quicker response was achieved than the ruthenium(II) complex EL devices without adding the BBOT electron transporting layer.

Original languageEnglish
Pages (from-to)149-153
Number of pages5
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume85
Issue number2-3
DOIs
Publication statusPublished - 2001 Aug 22

Keywords

  • Chemi luminescence
  • Electro luminescence
  • Electron transport
  • Light emitting device
  • Ruthenium

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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