6533b828fe1ef96bd1287c19

RESEARCH PRODUCT

Efficiency enhancement of organic light emitting diodes by NaOH surface treatment of the ITO anode

P. Cusumano

subject

Organic electronicsOrganic light emitting diodes (OLEDs)Materials sciencebusiness.industryEfficiencyCondensed Matter PhysicsTin oxideSettore ING-INF/01 - ElettronicaElectronic Optical and Magnetic MaterialsIndium tin oxideAnodeOpticsDevice fabrication techniqueITO surface treatmentWork function modificationMaterials ChemistryOLEDOptoelectronicsWork functionQuantum efficiencyElectrical and Electronic EngineeringbusinessCurrent density

description

Abstract Organic light emitting diodes (OLEDs) based on tris-(8-idroxyquinoline)aluminum (Alq 3 ) with enhanced efficiency are reported here. This is obtained by improving the charge carrier balance, through a preliminary NaOH surface treatment of the indium tin oxide (ITO) anode, in order to decrease its work function and, consequently, reduce the hole injection. The obtained devices exhibit a 1.36% external quantum efficiency and a 1.2 lm/W power efficiency at a current density of 60 mA/cm 2 . These values are more than double as compared with those of identical reference devices fabricated without the preliminary NaOH surface treatment.

yearjournalcountryeditionlanguage
2009-09-01
10.1016/j.sse.2009.05.005http://hdl.handle.net/10447/37348