Window film could even out the indoor temperature using solar energy
from Chalmers University of Technology via Science Daily
A window film with a specially designed molecule could be capable of taking the edge off the worst midday heat and instead distributing it evenly from morning to evening. The molecule has the unique ability to capture energy from the sun's rays and release it later as heat. This is shown by researchers at Chalmers University of Technology, Sweden, in the scientific journal Advanced Science. On sunny summer days it can be little short of unbearable to stay indoors or in cars.
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