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Tandem organic light-emitting diodes with KBH4 doped 9,10-bis(3-(pyridin-3-yl)phenyl) anthracene connected to the charge generation layer.

Authors
  • Duan, Lian
  • Tsuboi, Taiju
  • Qiu, Yong
  • Li, Yanrui
  • Zhang, Guohui
Type
Published Article
Journal
Optics Express
Publisher
The Optical Society
Publication Date
Jun 18, 2012
Volume
20
Issue
13
Pages
14564–14572
Identifiers
DOI: 10.1364/OE.20.014564
PMID: 22714518
Source
Medline
License
Unknown

Abstract

Tandem organic light emitting diodes (OLEDs) are ideal for lighting applications due to their low working current density at high brightness. In this work, we have studied an efficient electron transporting layer of KBH(4) doped 9,10-bis(3-(pyridin-3-yl)phenyl)anthracene (DPyPA) which is located adjacent to charge generation layer of MoO(3)/NPB. The excellent transporting property of the DPyPA:KBH(4) layer helps the tandem OLED to achieve a lower voltage than the tandem device with the widely used tris-(8-hydroxyquinoline)aluminum:Li. For the tandem white OLED with a fluorescent blue unit and a phosphorescent yellow unit, we've achieved a high current efficiency of 75 cd/A, which can be further improved to 120 cd/A by attaching a diffuser layer.

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