Patent ID: 8664970

Claim:
A method comprising: obtaining one or more individual organic emissive devices, each of the one or more organic devices having a first organic stack comprising one or more organic layers; measuring the lifetime of each of the one or more individual organic emissive devices at one or more temperatures at a non-heating current density; determining device lifetime for a selected luminance by using the measurements at the non-heating current density of the one or more devices; obtaining an organic emissive panel using a second organic stack that consists essentially of the one or more organic layers of the first organic stack; determining the junction temperature of the organic emissive panel at a heating current density; and determining the expected lifetime of the organic emissive panel at the heating current density by using the junction temperature of the organic emissive panel and the device lifetime of the one or more individual organic emissive device at the selected luminance; wherein measuring a lifetime of each of the one or more individual organic emissive devices is performed by an accelerated lifetime test; and wherein the accelerated lifetimes test comprises measuring the lifetime of a plurality of the individual organic emissive devices at a range of current densities.