Patent ID: 8003999

Claim:
An organic light emitting device comprising: a substrate; an encapsulation substrate; an organic light emitting unit interposed between the substrate and the encapsulation substrate; and a water vapor absorption material-containing sealant layer that covers and contacts at least a portion of the organic light emitting unit, the water vapor absorption material-containing sealant layer comprising: a sealant having a water vapor transmission rate (WVTR) of about 20 g/m 2 ·day or less, wherein the WVTR is measured using a film of the sealant having a thickness of 100 μm in an environment at the temperature of 38° C. and the relative humidity of 100%, wherein the sealant is substantially transparent, a water vapor absorption material selected from the group consisting of metal oxide and metal salt having average particle sizes of about 100 nm or less; wherein the substrate and the encapsulation substrate are interconnected via the water vapor absorption material-containing sealant layer; and wherein the sealant having a water vapor transmission rate (WVTR) of about 20 g/m 2 ·day or less comprises at least one of an acryl based resin and an epoxy silicate.