IIT Bombay has developed a technology called nanophotonic coating, that allows colour coating of solar glass buildings without affecting their energy-harvesting property.
The invention consists of a nanophotonic coating named Selectively Modulated Aesthetic Reflector Technology or SMART.
An IIT Bombay told The Hindu, “The beauty of this invention is, just like mixing colours or lights to make different other colours, here the inventors have succeeded in mixing nanophotonic coatings to generate different colour appearance for solar modules.”
The technology uses conventional solar cell to integrate into buildings as architectural glass for building fenestrations like windows, facades, roof shingles, etc. The invention consists of a nanophotonic coating named SMART (selectively modulated aesthetic reflector technology). “It is the technological secret to fabricate coloured solar modules,” said Antony.
The most efficient technologies require placement on horizontal surfaces like rooftops, and are also limited in their colours: blue or black absorb the most light; other colours reflect more light, permitting less of it to reach the solar cells.
This makes them less attractive to designers and architects. The Smart coating reflects only a selected wavelength of light, which gives it a coloured effect, while allowing the cell below to work with 60% to 80% efficiency.
It can also be used on vertical areas of buildings, increasing the options for designers to integrate them into their projects.
As per The Hindu ” The inventors are currently being approached by glass manufacturing companies and wish to license their technology to local players instead of international ones to promote technology development within the country.
Dr Antony hopes that they will get support from the government and media: “I feel our work has been in line with the government policy of Make in India campaign.”
Source: The Hindu