Improved white organic light-emitting diodes with modified dual-emission-layer designs

Ying Nan Lai, Wei Chou Hsu, Ching Sung Lee, Ching Wu Wang, Su Wei Yeh, Chiu Sheng Ho, Wen Feng Lai

Research output: Contribution to journalArticle

3 Citations (Scopus)


In this work, the improved efficiency of highly pure white-light emission of white organic light-emitting diodes (WOLEDs), consisting of 2-(tbutyl)-9,10-bis(2'-naphthyl) anthracene (TBADN) and 5,6,11,12- tetraphenylnaphthacene (rubrene) has been achieved. Systematic design structures with a progressive improvement in efficiency and color purity have been successfully investigated. A dual emission layer (EML) of TBADN structures with modified rubrene doping, and the insertion of carrier-blocking layers such as tris(8-hydroxyquinoline) aluminum (Alq3), 2,9-dimethyl-4,7-diphenyl-1,10- phenanthroline (BCP), and 2,2',2"-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H- benzimidazole) (TPBi) have been successfully designed and integrated to improve the device performance. The present cost-effective WOLED design, without the addition of blue dopants, demonstrated a superior high current efficiency of 6.09cd/A with excellent Commission Internationale De L'Eclairage (CIE) coordinates of (0:32;0:32).

Original languageEnglish
Article number072101
JournalJapanese journal of applied physics
Issue number7 PART 1
Publication statusPublished - 2009 Jul 1


All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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