6533b86dfe1ef96bd12c972c
RESEARCH PRODUCT
Hybrid organic-inorganic light emitting diodes: effect of the metal oxide
Henk J. BolinkMichele SessoloEugenio CoronadoHicham Brinesubject
Materials scienceBand gapOxidechemistry.chemical_element02 engineering and technologyZinc01 natural sciences7. Clean energylaw.inventionMetalchemistry.chemical_compoundlaw0103 physical sciencesMaterials ChemistryOLED010302 applied physicsbusiness.industryGeneral Chemistry021001 nanoscience & nanotechnologychemistryvisual_artTitanium dioxidevisual_art.visual_art_mediumOptoelectronics0210 nano-technologybusinessCurrent densityLight-emitting diodedescription
Hybrid organic-inorganic light emitting diodes (HyLEDs), employing metal oxides as the electron injecting contacts, are interesting as an alternative to OLEDs. Until recently, the metal oxide of choice was either titanium dioxide or zinc oxide. In this work two wide bandgap metal oxides, HfO2 and MgO, are employed as electron injecting layer in HyLEDs. It is demonstrated that both the current density and the luminance values obtained are directly related to the barriers for electron injection (from the ITO to the metal oxide) and for hole transfer to the same metal oxide, outlining a new design rule for the optimization of HyLEDs. Record device efficacies (3.3 cd/A, >10000 cd/m2) using the commonly used emitting polymer (F8BT) are obtained.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-01-01 | Journal of Materials Chemistry |