The invention provides an
OLED device with improved light out-
coupling, which can be manufactured easy and reliable at low costs, which comprises an electroluminescent layer stack (2, 3, 4) on top of a substrate (1), where the electroluminescent layer stack (2, 3, 4) comprises an organic light-emitting layer stack (3) with one or more organic
layers sandwiched between a first
electrode (2) facing towards the substrate (1) and a 10 second
electrode (4), where the second
electrode (4) comprises a layer stack of at least a transparent conductive
protection layer (41) on top of the organic light-emitting layer stack (3), a transparent organic conductive buckling layer (42) on top of the
protection layer (41) having a
glass transition temperature lower than the lowest
glass transition temperature of the organic
layers within the organic light-emitting layer stack (3) and a stress inducing layer 15 (43) on top of the buckling layer (42) to introduce stress to the buckling layer (42). The invention further relates to a method to manufacture such
OLED devices with heating the electroluminescent layer (2, 3, 4) stack to a temperature, which is above the
glass transition temperature of the buckling layer (42) and below the lowest glass
transition temperature of the organic
layers within the organic light-emitting layer stack (3) for a time period sufficient 20 to obtain buckles (B) within the buckling layer (42).