Search results for "Lifetime testing"

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Study of voltage decrease in organic light emitting diodes during the initial stage of lifetime

2016

Abstract We report the results of lifetime DC testing at constant current of not-encapsulated organic light emitting diodes (OLEDs) based on Tris (8 idroxyquinoline) aluminum (Alq3) as emitting material. In particular, a voltage decrease during the initial stage of the lifetime test is observed. The cause of this behavior is also discussed, mainly linked to initial Joule self-heating of the device, rising its temperature above room temperature until thermal equilibrium is reached at steady state.

Organic light emitting diodes (OLEDs)Lifetime testingMaterials scienceAlq3chemistry.chemical_elementJoule02 engineering and technologySettore ING-INF/01 - Elettronica01 natural sciencesAluminium0103 physical sciencesMaterials ChemistryOLEDElectrical and Electronic Engineering010302 applied physicsThermal equilibriumSteady statebusiness.industryJoule heating021001 nanoscience & nanotechnologyCondensed Matter PhysicsElectronic Optical and Magnetic MaterialschemistryOptoelectronicsConstant current0210 nano-technologybusinessJoule heatingDeep trapVoltageSolid-State Electronics
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