PURPOSE: To provide an electroluminescent device excellent in environment resisting characteristic in which the deterioration of emission due to Joule's heat is improved.
CONSTITUTION: An electron injecting cathode layer 503 is formed adjacent to a metal thin film 502 formed on a glass substrate 501, an electroluminescent emitting layer 504 and a hole injecting anode layer 506 are formed on the electron injecting cathode layer, and the outside surface of the laminated body consisting of the electron injecting cathode layer, the electroluminescent emitting layer and the hole injecting anode layer is sealed by a light transmitting protective film 508. The substrate consists of a metal base or flexible organic material base having an insulating layer on the surface or glass base. The metal thin film consists of a conductive metal reflecting light. The material of the electron injecting cathode layer consists of one material selected from the group consisting of calcium, lithium and magnesium. The thickness of the material is 100 to 500. The material of the light emitting layer consists of tris-(8- hydroxyquinolino) aluminium.
MATSUMOTO TOSHIO
MIZUKAMI TOKIO
KUWABARA AKIO
AIMESU KK