Ionic Materials to Improve Charge Injection in Polymer Electroluminescent Devices

Tae Woo Lee, Jong Hyeok Park, Ho Chul Lee, O. Ok Park

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


Balanced charge injection and recombination in polymer light-emitting devices are very important for high brightness and quantum efficiency. Ionic materials such as ionomers, single-ion conductors, and bi-ionic ionic blend materials were employed as charge injection layers (hole injecting layer, electron injecting layer, or both of them) in polymer electroluminescent (EL) devices. The charge injection can be greatly promoted due to dipole moments or the ionic space charges near both electrodes. Theses multi-layer approaches using ionic materials highly improve the EL quantum efficiencies. When we fabricated kinds of energy-well devices by incorporating hole- and electron-injecting layers simultaneously, the EL efficiency was highly enhanced and the current-voltage-luminescence characteristics are very similar to the light-emitting electrochemical cells.

Original languageEnglish
Pages (from-to)144-151
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2003
EventPROCEEDINGS OF SPIE SPIE - The International Society for Optical Engineering: Organic Photonic Materials and Devices V - San Jose, CA, United States
Duration: 2003 Jan 272003 Jan 30

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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