Transparent Solar Panels Will Turn Windows Into Green Energy Collectors

Researchers from Michigan State University developed completely transparent solar panels, which can have numerous applications in architecture, and other fields like mobile electronics or the automotive industry.

Researchers have tried to create such a device before as well, but the final results were never satisfying.

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The team focused on the see-through factor, so they developed a transparent luminescent solar concentrator, or TLSC, which can be placed over a clear surface like a window. It can harvest solar energy without affecting the transmittance of light.

The technology uses organic molecules which absorb light wavelengths which are not visible to the human eye, such as infrared and ultraviolet light. Richard Lunt, assistant professor of chemical engineering and materials science at MSU’s College of Engineering, says:

“We can tune these materials to pick up just the ultraviolet and the near infrared wavelengths that then ‘glow’ at another wavelength in the infrared. The captured light is transported to the contour of the panel, where it is converted to electricity with the help of thin strips of photovoltaic solar cells.”

A transparent luminescent solar concentrator waveguide is shown with colorful traditional luminescent solar concentrators in the background. The new LSC can create solar energy but is not visible on windows or other clear surfaces. Photo by G.L. Kohuth.

Since the vertical footprint is bigger than the rooftop one, especially in glass towers, these devices could make the most out of the buildings’ facades. They would not affect the architectural design but will represent a far more efficient technology. Yet, they can also be integrated into old buildings as well.

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