Light-emitting element having metal oxide and light-emitting device using the same
View Patent ↗It is an object of the invention is to provide a light-emitting element in which failure of the light-emitting element due to separation can be controlled and stable luminescence can be obtained with high-efficiency and for a long stretch of time by controlling separation of layers constituting the light-emitting element. According to one aspect of a light-emitting element of the invention, the light-emitting element sandwiches a plurality of layers between a pair of electrodes, wherein at least one layer of the plurality of layers is a layer containing a substance selected from bismuth oxide, cobalt oxide, chromium oxide, copper oxide, nickel oxide, and titanium oxide, or at least one layer of layers different from a light-emitting layer among the plurality of layers is a mixed region of one substance selected from bismuth oxide, cobalt oxide, copper oxide, magnesium oxide, nickel oxide, zinc oxide, and titanium oxide and an organic compound.
1. A light-emitting element comprising:
a cathode and an anode; and
a plurality of layers sandwiched between the cathode and anode,
wherein the plurality of layers include:
a first layer comprising a composite material of an organic compound and a conductive inorganic compound;
a second layer having an organic compound; and
a layer consisting of a substance selected from bismuth oxide, cobalt oxide, chromium oxide, copper oxide, and nickel oxide,
wherein the layer is in contact with the cathode.
2. A light-emitting element according to claim 1 , wherein the layer is arranged to have a thickness enough for a tunneling current to flow.
3. A light-emitting device having the light-emitting element according to claim 2 .
4. A light emitting device according to claim 3 ,
wherein the light emitting device is incorporated into an electronic device.
5. A light-emitting device having the light-emitting element according to claim 1 .
6. A light emitting device according to claim 5 ,
wherein the light emitting device is incorporated into an electronic device.
7. A light emitting device according to claim 1 ,
wherein the conductive inorganic compound is molybdenum oxide.
8. A light emitting device according to claim 1 ,
wherein the conductive inorganic compound is molybdenum oxide, and wherein the organic compound in the first layer is an aromatic amine.
9. A light-emitting element comprising:
a pair of electrodes; and
a plurality of layers sandwiched between the pair of electrodes,
wherein the plurality of layers include:
a first layer having an organic compound;
a second layer having an organic compound; and
a layer consisting of a substance selected from bismuth oxide, cobalt oxide, chromium oxide, copper oxide, and nickel oxide,
wherein the layer is in contact with one of the pair of electrodes which functions as a cathode.
10. A light-emitting device having the light-emitting element according to claim 9 .
11. A light emitting device according to claim 10 ,
wherein the light emitting device is incorporated into an electronic device.