Paper Title:
Organic Light-Emitting Diodes with Varying Thickness of Bathocuproine Layer
  Abstract

A series of organic light-emitting diodes (OLEDs) with or without a bathocuproine (BCP) layer inserted in the control device indium-tin-oxide (ITO)\ N,N'-bis-(1-naphthl)-diphenyl-1,1'- biphenyl-4,4'-diamine (NPB)\ tris(8-quinolinolato) aluminum (Alq)\LiF\Al have been fabricated and measured. Different influences of the BCP layer on electroluminescence (EL) of the OLEDs have been investigated. It is found that the highest efficiency of the OLED with a 1-nm BCP layer inserted between NPB and Alq increases to 3.99 cd/A, ~48% higher than that of the control device, while the EL efficiencies of the devices with other structures are similar to the latter. This phenomenon is ascribed to the hole-blocking effect of the BCP layer and the resulting higher density of carriers in the emission zone of the OLED. The EL performances of the OLEDs with different thicknesses of BCP layer are also discussed in details.

  Info
Periodical
Chapter
Chapter 2: Frontiers of Materials Science and Engineering
Edited by
Ran Chen
Pages
901-907
DOI
10.4028/www.scientific.net/MSF.694.901
Citation
G. Y. Zhong, P. Y. Fang, Y. M. Cao, "Organic Light-Emitting Diodes with Varying Thickness of Bathocuproine Layer", Materials Science Forum, Vol. 694, pp. 901-907, 2011
Online since
July 2011
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