Emission spectra dependence on voltage and emissive layer layout in organic light-emitting diodes

Zhaoyue Lü, Ying Hou, Jing Xiao, Haisheng Xu

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Based on the device structure of indium tin oxide (ITO)/N,N′- diphenyl-N,N′-bis(1-naphthyl-phenyl)-1,1′-biphenyl-4, 4′-diamine (NPB)/4-(dicyanomethylene)-2-tert-butyl-6-(1,1,7,7- tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB)/tris (8-hydroxy quinoline) aluminum (Alq3)/NPB/bathocuproine (BCP)/Al, the variation of emissive spectra with voltage and emissive unit (DCJTB/Alq3/NPB) parameters has been investigated. All electroluminescent spectra contain two components: blue emission from NPB and red emission of DCJTB. The Alq3 emission is not observed due to its relative shallow LUMO (the lowest unoccupied molecular orbital) and deep HOMO (the highest occupied molecular orbital). The emission of NPB is increased with voltages as well as the thickness of NPB and Alq3 for more holes escape from DCJTB and get in NPB to recombine with electrons.

Original languageEnglish (US)
Pages (from-to)197-199
Number of pages3
JournalVacuum
Volume109
DOIs
StatePublished - Nov 2014

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Emission spectra dependence on voltage and emissive layer layout in organic light-emitting diodes'. Together they form a unique fingerprint.

  • Cite this