Transparent conductive film and method for producing transparent conductive film
Disclosed is a transparent conductive film containing a single-walled carbon nanotube and a fullerene.
1. A transparent conductive film, comprising:
a single-walled carbon nanotube; and
a fullerene directly bonded to an OH group,
wherein, when a surface resistivity after having kept the transparent conductive film at 80° C. for 14 days is defined as R1 (Ω/□), and a surface resistivity before keeping the transparent conductive film at 80° C. for 14 days as R0 (Ω/□), an increase ratio [(R1−R0)/R0×100] of a surface resistivity is 30 or less,
wherein the total light transmittance of the transparent conductive film is 80% or more and the surface resistivity of the transparent conductive film is 3000Ω/□ or less.
2. The transparent conductive film as claimed in claim 1 , comprising the single-walled carbon nanotube and the fullerene in an identical layer.
3. The transparent conductive film as claimed in claim 1 , wherein a layer comprising the single-walled carbon nanotube and a layer comprising the fullerene are different.
4. The transparent conductive film as claimed in claim 3 , wherein the layer comprising the fullerene is present on the layer comprising the single-walled carbon nanotube.
5. The transparent conductive film as claimed in claim 1 , having a content of 10 to 1000 mass parts of the fullerene per 100 mass parts of the single-walled carbon nanotube.
6. The transparent conductive film as claimed in claim 1 , wherein the fullerene has a polar group.
7. The transparent conductive film as claimed in claim 1 , wherein the quantity of the hydroxyl groups is 5 to 30 groups per one molecule of the fullerene.
8. The transparent conductive film as claimed in claim 1 , wherein the quantity of the hydroxyl groups is 8 to 15 groups per one molecule of the fullerene.
9. The transparent conductive film as claimed in claim 1 , having a content of 20 to 100 mass parts of the fullerene per 100 mass parts of the single-walled carbon nanotube.
10. The transparent conductive film as claimed in claim 1 , wherein the fullerene is C60.
11. The transparent conductive film as claimed in claim 1 , which has a surface resistivity of 200Ω/□ or less.
12. A method of making the transparent conductive film as claimed in claim 1 , comprising preparing a transparent conductive film comprising the single-walled carbon nanotube and the fullerene directly bonded to an OH group.