A team of Chinese scientists has created a technology based on multilayered cholesteric liquid crystals that selectively directs sunlight to the edges of the glass, where photovoltaic cells are installed. This system can harvest up to 38% of the energy from incoming green light, while the windows maintain an average transparency of about 64% and a color rendering index of 91.3%.
A prototype of the device has already demonstrated its ability to power a 10-milliwatt fan in direct sunlight. Computer modeling has shown that a two-meter window with this coating concentrates light 50 times more effectively than a traditional window, reducing the required area of photovoltaic cells by 75% and lowering material costs.
The technology is easily scalable and compatible with existing industrial manufacturing methods. It is also suitable for integration into existing building structures without negatively affecting their architecture. The scientists plan to improve the coating’s efficiency and are exploring its potential applications in greenhouses and other transparent surfaces.
This new development paves the way for transforming passive glass surfaces into active energy generators, which could significantly change the approach to urban construction and the development of renewable energy.
