Not my field, but quantum dots are incredible. Quantum dots are of reversible polarity, a QD can absorb a photon of the same frequency it can release. QD freq

Not my field, but quantum dots are incredible. Quantum dots are of reversible polarity, a QD can absorb a photon of the same frequency it can release. QD frequency response is a function of size, not composition: unlike traditional LEDs there's no need to discover the specific doping materials required for a given frequency. Make the design bigger/smaller, and it will resonate with a proportionally higher/lower wavelength (respectively). There are limitations, UV frequencies require very small dots and infrared relatively large, which presents manufacturing difficulties. A lot of the current dots utilise rare earth metals in their composition, but less toxic and more readily available materials have been researched and found viable (though I'm not sure about difficulties reaching mass production). So what can we do with them? Absorb and emit light - think televisions, solar, heating, cooling, refrigeration, cameras, projectors. Imagine a television with subzero blacks and active glare elimination. The same panel (with infrared dots) could heat or cool the room. You could have a television that can emit light across the whole of the visible spectrum. Defective monitors could be adapted as solar panels (reverse the polarity).