| 摘要 |
To provide a method of improving an efficiency for extracting light in a self light-emitting device using an organic EL material. In the self light-emitting device having a structure in which an EL layer ( 102 ) is sandwiched between a transparent electrode ( 103 ) and a cathode ( 101 ), a film thickness of the EL layer ( 102 ) and a film thickness of the transparent electrode ( 102 ) are equivalent to the film thicknesses in which there is no occurrence of a guided light, and an inert gas is filled in a space between the transparent electrode ( 103 ) and a cover material ( 105 ).
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