An electroluminescent device includes a lower structure and a flexible encapsulation multilayer. The lower structure may have an emission area and a peripheral area surrounding the emission area. The flexible encapsulation multilayer may be disposed on the emission area and the peripheral area. The peripheral area may include an inorganic surface portion having a closed shape continuously surrounding the display area and comprising one or more inorganic materials. The flexible encapsulation multilayer may include a lower surface comprising only one or more inorganic materials. The lower surface of flexible encapsulation multilayer may be in in direction contact with the inorganic surface portion.