Electroluminescent device having window

An electroluminescent device, comprising:

• a lower structure comprising a light transmitting region, a non-transparent emission area surrounding the light transmitting region in a plan view and having a light transmittance lower than the light transmitting region, and an outer non-emission area surrounding the non-transparent emission area in a plan view;
• and
• an encapsulation structure located on the lower structure and having an inorganic lower surface, wherein
• the outer non-emission area has an outer inorganic surface portion surrounding the non-transparent emission area in a plan view and making a direct contact with the inorganic lower surface to form an inorganic-inorganic contact region surrounding the non-transparent emission area in a plan view,
• the lower structure comprises:
• an inorganic structure comprising a buffer layer including an inorganic material and a transistor on the buffer layer;
• a planarization layer located on the inorganic structure;
• a lower electrode located on the planarization layer;
• a pixel defining layer located on the planarization layer to cover a side portion of the lower electrode;
• an intermediate multilayer located on the lower electrode and having at least one functional layer;
• and
• an upper electrode located on the intermediate multilayer,
• a portion of the buffer layer corresponding the light transmitting region is present and permanently remains so that the buffer layer overlaps the light transmitting region,
• the at least one functional layer and/or the upper electrode is a common pattern layer, and a portion of the common pattern layer corresponding the light transmitting region is not present, and
• a portion of the upper electrode corresponding the light transmitting region is not present, the lower structure further comprises an organic passivation layer located on the upper electrode to make a direct contact with the upper electrode, the organic passivation layer having a conductive or semi-conductive property, the organic passivation layer being a common pattern layer, and a portion of the organic passivation layer corresponding the light transmitting region is present and permanently remains so that the organic passivation layer overlaps the light transmitting region.