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Which Semiconductors are Suitable for Optical Devices?

Image Credit: Marko Aliaksandr/Shutterstock.com Semiconductors are a widely used class of materials with electrical conductivities that fall between that of conductors and insulators. What has made doped versions of these materials the cornerstone of modern electronics is their ability to control the flow of electrons as part of a circuit, switching on and off as required, with a minimal physical device footprint. Controlling the flow of electrons is not the only interesting application of semiconductor materials. Some semiconducting materials can be used to either convert electricity into light or, to do the reverse, converting absorbed light energy into electrical charge.

How Windows Could Redirect Light to Solar Cells

How Windows Could Redirect Light to Solar Cells Image Credit: Jason Finn/Shutterstock.com Buildings of the future could have much improved environmental credentials thanks to next-generation windowpanes that redirect light to solar panels positioned along their outer edges. Such ‘smart glass’ windows would utilize light from the sun and artificial light from within the building to generate electricity. Innovative Energy Collection Luminescent solar concentrators (LSCs) are devices that concentrate solar radiation to produce electricity. They have been suggested as an innovative and colorful solution to future energy collection by Rice University engineers, who have designed and built a polymer core-based luminescent window that generates energy using sunlight or light from LEDs.

Luminescent windows generate energy from inside and out - Sonnenseite - Ökologische Kommunikation mit Franz Alt

Rice engineers develop polymer cores that redirect light from any source to solar cells Rice University engineers have suggested a colorful solution to next-generation energy collection: Luminescent solar concentrators (LSCs) in your windows. Led by Rafael Verduzco and postdoctoral researcher and lead author Yilin Li of Rice’s Brown School of Engineering, the team designed and built foot-square “windows” that sandwich a conjugated polymer between two clear acrylic panels. That thin middle layer is the secret sauce. It’s designed to absorb light in a specific wavelength and guide it to panel edges lined with solar cells. Conjugated polymers are chemical compounds that can be tuned with specific chemical or physical properties for a variety of applications, like conductive films or sensors for biomedical devices.

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