Applied Physics Letters · 2009 · 141 citations · 16 references
EngineeringOrganic ElectronicsOptoelectronic DevicesChemistryElectronic DevicesOrganic LightLight-emitting DiodesAtomic Layer DepositionMaterials ScienceNanotechnologyOrganic SemiconductorNew Lighting TechnologyZro2 SublayersOrganic MaterialsWhite OledSolid-state LightingElectronic MaterialsApplied PhysicsThin FilmsOptoelectronics
We report on highly efficient gas diffusion barriers for organic light emitting diodes (OLEDs). Nanolaminate (NL) structures composed of alternating Al2O3 and ZrO2 sublayers grown by atomic layer deposition at 80 °C are used to realize long-term stable OLED devices. While the brightness of phosphorescent p-i-n OLEDs sealed by a single Al2O3 layer drops to 85% of the initial luminance of 1000 cd/m2 after 1000 h of continuous operation, OLEDs encapsulated with the NL retain more than 95% of their brightness. An extrapolated device lifetime substantially in excess of 10 000 h can be achieved, clearly proving the suitability of the NLs as highly dense and reliable thin film encapsulation of sensitive organic electronic devices.
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Reliability and degradation of organic light emitting devices
P. E. Burrows, Vladimir Bulović, Stephen R. Forrest et al. · Applied Physics Letters · 1994 · 734 citations
Formation and growth of black spots in organic light-emitting diodes
Jon S. McElvain, Homer Antoniadis, M. R. Hueschen et al. · Journal of Applied Physics · 1996 · 303 citations