The doping effect of cesium-based compounds on carrier transport and operational stability in organic light-emitting diodes

Yan-Hong Deng, Yan-Qing Li, Qing-Dong Ou, Qian-Kun Wang, Fu-Zhou Sun, Xiang Yu Chen, Jian-Xin Tang

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25 Citations (Scopus)

Abstract

The doping effect of cesium compounds (i.e., Cs2CO3, CsN3 and CsF) doped electron injection layer (EIL) on charge transport properties and operational stability of organic light-emitting diodes (OLEDs) was systematically investigated in this work. It has been found that device characteristics and lifetime are highly dependent on the doping constituent materials. The doping of cesium compounds in EIL can improve the charge injection and transport of OLEDs, due to the increase in conductivity and reduction in electron injection barrier. Apart from the difference in electrical characteristics, the operational stability of OLEDs is strongly influenced by the doping mechanism of different cesium compounds in the EILs. The OLED device using Cs2CO3 as the n-type dopant for the EIL shows a superiority in both electrical property and operational lifetime.

Original languageEnglish
Pages (from-to)1215-1221
Number of pages7
JournalOrganic Electronics
Volume15
Issue number6
DOIs
Publication statusPublished - Jun 2014
Externally publishedYes

Keywords

  • Cesium compounds
  • n-Type dopant
  • Operational stability
  • Organic light-emitting diodes

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