Organic light-emitting device comprising buffer layer and method for fabricating the same

A method for fabricating an organic light-emitting device, comprising the step of sequentially laminating a first electrode, at least two organic layers and a second electrode on a substrate, in which one of the organic layers is formed as a light-emitting layer, and one of the organic layers, which is in contact with the second electrode, is formed from a compound represented by the following formula 1:

• wherein R1 to R6 are each independently selected from the group consisting of hydrogen, halogen atoms, nitrile (—CN), nitro (—NO2), sulfonyl (—SO2R), sulfoxide (—SOR), sulfonamide (—SO2NR), sulfonate (—SO3R), trifluoromethyl (—CF3), ester (—COOR), amide (—CONHR or —CONRR′), substituted or unsubstituted straight or branched chain C1-C12 alkoxy, substituted or unsubstituted straight or branched C1-C12 alkyl, substituted or unsubstituted aromatic or non-aromatic heterocyclic rings, substituted or unsubstituted aryl, substituted or unsubstituted mono- or di-arylamine, and substituted or unsubstituted aralkylamine, and R and R′ are each independently selected from the group consisting of substituted or unsubstituted C1-C60 alkyl, substituted or unsubstituted aryl, and substituted or unsubstituted 5-7 membered heterocyclic rings.