Light-emitting device exhibiting electrochemical luminescence

A light-emitting device comprising:

• a first substrate composed of a glass substrate;
• a first pair of electrodes formed above the first substrate and composed of a transparent conductive film;
• a second substrate disposed to face the first substrate and spaced apart from the first substrate;
• a second pair of electrodes formed above the second substrate;
• a first light-emitting layer disposed between the first substrate and the second substrate and close to the first substrate, the first light-emitting layer comprising a first light-emitting material which emits light through an electrochemical oxidation or reduction thereof and a supporting salt;
• a second light-emitting layer disposed between the first substrate and the second substrate and close to the first substrate, the second light-emitting layer comprising a second light-emitting material which emits light through an electrochemical oxidation or reduction thereof and a supporting salt;
• and
• a selective permeable layer interposed between the first light-emitting layer and the second light-emitting layer, the selective permeable layer being non-permeable or hardly permeable to the first and second light-emitting materials but permeable to the supporting salt.

A light-emitting device comprising:

• a first substrate;
• a first pair of electrodes formed above the first substrate;
• a second substrate composed of a glass substrate and disposed to face the first substrate and spaced apart from the first substrate;
• a second pair of electrodes formed on the second substrate and composed of a transparent conductive film;
• a first light-emitting layer disposed between the first substrate and the second substrate and close to the first substrate, the first light-emitting layer comprising a first light-emitting material which emits light through an electrochemical oxidation or reduction thereof and a supporting salt;
• a second light-emitting layer disposed between the first substrate and the second substrate and close to the first substrate, the second light-emitting layer comprising a second light-emitting material which emits light through an electrochemical oxidation or reduction thereof and a supporting salt;
• and
• a selective permeable layer interposed between the first light-emitting layer and the second light-emitting layer, the selective permeable layer being non-permeable or hardly permeable to the first and second light-emitting materials but permeable to the supporting salt.