INNOVATION: Singapore scientists seek power from darkness through shadow energy

Scientists in Singapore are hoping to perfect a new method of power generation driven largely by shadows, with the hope that it could one day help highly urbanised cities power themselves.
The shadow-effect energy generator (SEG) being developed by the National University of Singapore has the potential to harness power like solar cells, but without needing open spaces with uninterrupted light.
To work effectively, the SEG requires both light and dark and, like solar panels, relies on light to shine on silicon to energise electrons.
However, using panels that feature a thin layer of either gold, silver, platinum or tungsten, the difference in light intensity drives electrons from lit areas towards the shade, creating electricity in the shaded areas.

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