SOLAR PANELS WITH RAINBOW COLOURS
What if solar panels could display the colours of sunlight rather than being merely dark blue or black? The American company Prism Solar produces innovative solar panels with integrated strips of holographic film that create beautiful rainbow effects. But the holographic film doesn't simply add aesthetic value to the solar panels: it effectively acts as a planar concentrator, diffracting the light and partly guiding it to the cells. As a result, these colourful solar panels a