Molecular ionic junction for enhanced electronic charge transfer

Research output: Contribution to journalArticlepeer-review


  • Henk J. Bolink
  • Etienne Baranoff
  • Miguel Clemente-León
  • Eugenio Coronado
  • Angel Lopéz-Muñoz
  • Diego Repetto
  • Michele Sessolo
  • Md K. Nazeeruddin

Colleges, School and Institutes

External organisations

  • Laboratory of Photonics and Interfaces, Department de Chimie, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland.
  • Fundació General de la Universitat de Valencia (FGUV)
  • Universidad de Valencia
  • Laboratory for Photonics and Interfaces
  • Ecole Polytechnique Fédérale de Lausanne
  • Institute de Ciencia Molecular
  • Fundació General de la Universidad de Valencia (FGUV)


We present the first evidence of charge injection improvement in an organic electroluminescent device provided by a single ionic molecular layer. A hole-dominated, hybrid organic-inorganic light-emitting device is used as a probe to verify the effectiveness of the ionic compound monolayer on modifying the metal oxide cathode. The rearrangement of ions under an applied bias induces a strong field at the electrode-organic interface resulting in an enhancement of the electron injection into the organic semiconductor. A strong decrease in turn-on voltage for electroluminescence is observed for the device containing the ionic molecular monolayer.


Original languageEnglish
Pages (from-to)79-83
Number of pages5
Issue number1
Publication statusPublished - 6 Jan 2009