Organic electroluminescence light-emitting device and production method thereof

摘要

An object of the present invention is to provide an organic EL light-emitting device in which a permeation and diffusion of moisture from outside are prevented and a stable light-emitting characteristic is able to be maintained for a long period. The present invention relates to an organic EL light-emitting device comprising a sealing layer, a hygroscopic layer and a protective layer, which are aligned on the back of an organic electroluminescence element under a predetermined condition, wherein the sealing layer and the protective layer are constituted from a specific material, whereby it is possible to maintain a stable light-emitting characteristic for a long period together with suppressing the deterioration caused by moisture being permeated from outside.

主权项

1. An organic electroluminescence light-emitting device, comprising:
a translucent substrate; a first electrode formed on the translucent substrate; an organic functional layer formed on the first electrode and including at least a luminescent layer; a second electrode formed on the organic functional layer; a sealing layer which comprises a thermoplastic resin and has been formed so as to cover at least the surfaces of the first electrode, second electrode and organic functional layer; a protective layer having flexibility and formed over the sealing layer; and a hygroscopic layer which contains a desiccant and which has been disposed between the protective layer and the sealing layer and formed so as to surround at least a luminescent region of the luminescent layer, wherein the edge of the hygroscopic layer protrudes, along a horizontal direction, from the edge of the luminescent region by 0.4 mm or longer and is shorter than the edge of the sealing layer, and that region of the sealing layer, which is outside the edge of the luminescent region in which the hygroscopic layer is not formed, has a thickness that is smaller than the thickness of the sealing layer which is located over the luminescent region.