Molecular ionic junction for enhanced electronic charge transfer.
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.
Bolink
Henk J
HJ
Instituto de Ciencia Molecular, and Fundació General de la UniVersidad de Valencia (FGUV),UniVersidad de Valencia, P.O. Box 22085, E-46071 Valencia, Spain. henk.bolink@uv.es
Baranoff
Etienne
E
Clemente-León
Miguel
M
Coronado
Eugenio
E
Lopéz-Muñoz
Angel
A
Repetto
Diego
D
Sessolo
Michele
M
Nazeeruddin
Md K
MK