“A thin film of plastic that conducts electricity and produces solar power could be the basis for a revolution in the way homes are lit and clothes are designed.
The devices exploit a discovery made around 15 years ago 
that some polymers have the unusual property of either turning electricity into light, or light into electricity, depending on their construction. Because these polymers are thin and flexible, they could be used in a multiplicity of ways:
* As a window that is transparent during the day but, at night, the entire window area is switched to emit light in a more efficient way than conventional or even energy-saving bulbs, promising huge savings”…. <More>
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