With this circuit, any type of LED can be driven from a single-cell supply in the range of 1.0 to 1.5 V (see the figure). As a result, it can be used with alkaline, carbon-zinc, NiCd, or NiMH cells ...
A new class of materials that can absorb low energy light and transform it into higher energy light might lead to more efficient solar panels, more accurate medical imaging and better night vision ...
It was unclear what allows the energy of two low-energy photons to efficiently combine. Kobe University researchers now found that two molecules in an excited state have to be aligned, and for that to ...
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