Transparent films with control of light hue using nanoscale colorants
AssigneeC3 Nano, Inc.
InventorsXiqiang Yang, Yadong Cao, Yongxing Hu, Hua Gu, Ying-Syi Li, Ajay Virkar
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Abstract
Nanoscale colorants are introduced to adjust the hue of transparent conductive films, such as to provide a whiter film. The transparent conductive films can have sparse metal conductive layers, which can be formed using silver nanowires. Color of the film can be evaluated using standard color parameters. In particular, values of color parameter b* can be reduced with the nanoscale colorants without unacceptably changing other parameters, such as haze, a* and transparency.
Claims26
A transparent conductive film comprising a substrate, a transparent conductive layer supported by the substrate, a coating and one or more nanoscale pigments, wherein a value of b* for the film is reduced at least about 0.1 units and total transmittance of visible light in percent is not decreased by more than about 2 relative to the corresponding film without the nanoscale pigments wherein the nanoscale pigments in a dilute dispersion having a peak absorption between 525 nm and 675 nm.
A transparent conductive film comprising a substrate, a transparent conductive layer supported by the substrate, and a coating comprising nanoscale metal elements and a polymer binder wherein the transparent conductive layer comprises a sparse metal conductive layer, and wherein nanostructured metal elements in a dilute dispersion having a peak absorption between 525 nm and 675 nm.
A transparent conductive film comprising a substrate and a transparent conductive layer comprising a sparse metal conductive element and a polymer binder, wherein the transparent conductive layer comprises nanostructured metal features having an absorption at 580 nm at least about 2 times the absorption at 475 nm, wherein the transparent conductive film has a value of b* is lowered by at least a value of about 0.1 and a value of % TT lowered by no more than about 2 relative to the equivalent transparent conductive layer without the nanostructured metal features.
A coating solution comprising from about 0.02 wt % to about 80 wt % non-volatile polymer binder precursor compounds, from about 0.0001 wt % to about 2.5 wt % nanoscale metal elements, from about 0.01 wt % to about 1 wt % metal nanowires and solvent wherein the nanoscale metal elements have an absorption at 580 nm at least about 2 times the absorption at 475 nm and wherein nanostructured metal features in a dilute dispersion in water having a peak absorption between 525 nm and 675 nm.
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Dependencies are inferred from the claim text.