Graphene sheet, transparent electrode, active layer including the same, display, electronic device, optoelectronic device, battery, solar cell, and dye-sensitized solar cell including the electrode or active layer
View Patent ↗The present invention relates to a graphene sheet and a transparent electrode, and an active layer including the same, and a display device, an electronic device, an optoelectronic device, a battery, a solar cell, and a dye-sensitized solar cell including these. The graphene sheet includes a lower sheet including 1 to 20 graphene layers, and a ridge formed on the lower sheet and including more graphene layers. The ridge has a metal grain boundary shape.
1. A graphene sheet comprising:
a graphene lower sheet including 1 to 20 graphene layers accumulated on a substrate, and
a ridge formed on the graphene lower sheet,
wherein the ridge has a metal grain boundary shape and comprises more graphene layers than the graphene lower sheet, and
wherein the lowest graphene layer contacting the substrate in the graphene sheet is continually formed without any wrinkles.
2. The graphene sheet of claim 1 , wherein all the graphene layers in the graphene sheet are continually formed without any wrinkles.
3. The graphene sheet of claim 1 , wherein the graphene sheet has an area of equal to or more than 1 μm 2 .
4. The graphene sheet of claim 1 , wherein the graphene sheet is directly formed on the substrate.
5. The graphene sheet of claim 1 , wherein the ridge comprises 3 to 50 graphene layers.
6. The graphene sheet of claim 1 , wherein the metal has a grain size ranging from 10 nm to 10 mm.
7. The graphene sheet of claim 1 , wherein the metal has a grain size ranging from 10 nm to 500 μm.
8. The graphene sheet of claim 1 , wherein the metal has a grain size ranging from 50 nm to 10 μm.
9. The graphene sheet of claim 1 , which has a light transmission degree of equal to or more than 60%.
10. The graphene sheet of claim 1 , which has transparency of equal to or more than 80%.
11. The graphene sheet of claim 1 , which has sheet resistance of equal to or less than 2000 Ω/square.
12. The graphene sheet of claim 1 , which has sheet resistance of equal to or less than 274 Ω/square.
13. A transparent electrode comprising the graphene sheet according to claim 1 .
14. An active layer including the graphene sheet according to claim 1 .
15. A display device comprising the transparent electrode of claim 13 .
16. An electronic device comprising the active layer of claim 14 .
17. The display device of claim 15 , wherein the display device is a liquid crystal display, an electronic paper display device, or an optoelectronic device.
18. The electronic device of claim 16 , wherein the electronic device is a transistor, a sensor, or an organic/inorganic semiconductor device.
19. An optoelectronic device comprising
an anode, a hole transport layer (HTL), an emission layer, an electron transport layer (ETL), and a cathode,
wherein the anode is the transparent electrode according to claim 13 .