| 摘要 |
PROBLEM TO BE SOLVED: To provide an adhesive sealing film that has low moisture vapor permeability, that is, high moisture barrier property and high adhesive property, a sealing method, and electroluminescent device.SOLUTION: An organic electroluminescent device 1 comprises: a substrate 2; a first electrode 3 formed on the substrate; an organic function layer 4 formed on the first electrode and having at least a light emitting layer; a second electrode 5 formed on the organic function layer; and a sealing layer formed from an adhesive sealing film 6, which is arranged so as to cover the surfaces of the first electrode, the second electrode and the organic function layer. In the organic electroluminescent device 1, the adhesive sealing film contains a polyisobutylene with a number-average molecular weight of 10000 or more, and a tackifier resin with a carbon double bond content of not less than 1.6% but not more than 50.0%. When the adhesive sealing film is arranged so as to cover at least the first electrode, the second electrode, and the organic function layer, the adhesive sealing film is arranged at 70°C or above but at 150°C or below. |
