Electric-field-assisted charge generation and separation process in transition metal oxide-based interconnectors for tandem organic light-emitting diodes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Jin-Peng Yang
  • Yan Xiao
  • Yan-Hong Deng
  • Steffen Duhm
  • Nobuo Ueno
  • And 3 others
  • Shuit-Tong Lee
  • Yan-Qing Li
  • Jian-Xin Tang

Detail(s)

Original languageEnglish
Pages (from-to)600-608
Journal / PublicationAdvanced Functional Materials
Volume22
Issue number3
Publication statusPublished - 8 Feb 2012

Abstract

The charge generation and separation process in transition metal oxide (TMO)-based interconnectors for tandem organic light-emitting diodes (OLEDs) is explored using data on electrical and spectral emission properties, interface energetics, and capacitance characteristics. The TMO-based interconnector is composed of MoO 3 and cesium azide (CsN 3)-doped 4,7-diphenyl-1,10-phenanthroline (BPhen) layers, where CsN 3 is employed to replace the reactive metals as an n-dopant due to its air stability and low deposition temperature. Experimental evidences identify that spontaneous electron transfer occurs in a vacuum-deposited MoO 3 layer from various defect states to the conduction band via thermal diffusion. The external electric-field induces the charge separation through tunneling of generated electrons and holes from MoO 3 into the neighboring CsN 3-doped BPhen and hole-transporting layers, respectively. Moreover, the impacts of constituent materials on the functional effectiveness of TMO-based interconnectors and their influences on carrier recombination processes for light emission have also been addressed. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Research Area(s)

  • charge-generation layers, CsN 3, tandem organic light-emitting diodes (OLEDs), transition metal oxides

Citation Format(s)

Electric-field-assisted charge generation and separation process in transition metal oxide-based interconnectors for tandem organic light-emitting diodes. / Yang, Jin-Peng; Xiao, Yan; Deng, Yan-Hong; Duhm, Steffen; Ueno, Nobuo; Lee, Shuit-Tong; Li, Yan-Qing; Tang, Jian-Xin.

In: Advanced Functional Materials, Vol. 22, No. 3, 08.02.2012, p. 600-608.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal