Graphene is an excellent electronic material, but it is not suitable for optical applications because of its poor ability to absorb light. Now, British scientists have developed a new technology that mimics moth-eyes, which can increase the absorbance of graphene by 90%. It is expected to be applied to the Internet of Things such as “smart wallpaper†in the future. This "smart wallpaper" absorbs indoor light and heat and turns it into electricity for home use.
In this study by the University of Surrey, the researchers developed a nanoscale super-extraordinary study of the moth's eyes to maximize the absorption of light and make it visible in the dark. Thin graphene material.
Like the moth eye, this material has a micro structure that reduces light reflection and increases light absorption. Solar panels coated with this material can absorb very weak light. By installing such solar panels indoors, it can be part of a "smart wallpaper" or "smart window" and generate electricity by absorbing the light or heat from the lights.
Graphene has always been known for its excellent electrical conductivity and mechanical strength, but its poor light absorption ability can only absorb about 2.3% of incident light. Researchers at the University of Surrey have greatly improved their absorbance through a method called nanotexturing.
Dr. José Anguita, who led the study, said that graphene with nanotexture can introduce light into the narrow space between its nanotextures, thus increasing the light it absorbs.
Angita said that in general, a layer of graphene can only absorb 2% to 3% of light. But with this new approach, graphene with nanotexture can absorb 95% of incident light, including a wide spectrum from ultraviolet to infrared.
The researchers pointed out that after developing this material, the next step is to apply this material to different technologies that are both existing and under development.
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