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Modification of Indium Tin Oxide for Improved Hole Injection in Organic Light Emitting Diodes
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2001
Year
EngineeringOrganic ElectronicsHole InjectionNanoelectronicsIndium Tin OxideElectronic PackagingAfm ImagesCompound SemiconductorThin Film ProcessingMaterials ScienceElectrical EngineeringNew Lighting TechnologyMicroelectronicsImproved Hole InjectionWhite OledSolid-state LightingSurface ScienceApplied PhysicsOptoelectronics
The efficiency of multi-layer OLEDs using indium tin oxide (ITO) and triphenyldiamine is limited by the hole injection rate, or the quality of the contact between the two components, respectively. Coating the ITO with an ultra-thin Pt layer dramatically improves hole injection, and significantly lowers the devices' operating voltage. The Figure juxtaposes AFM images of an unmodified (left) and Pt-coated ITO electrode (right).