Jenny Nelson, “Harnessing the Sun” (Open Agenda, 2021)
New Books in Science
00:00
The Ideal Solar Cell?
The best solar sell of all m that's known to day is made from another semi conductor, which is galliam arseni wor. They've improved the quality of the crystal so much that they're almost at the radiative limit. So if you can excite an electron from here to here with a photon, you cannot prevent the decay of an electron fromHere to Here with a photon. It's got to happen. And this is where detailed balance comes in. The matric element for photon absorption, m and for for photons emission are the same. If one is on zero, the other is non zero. And that's te thing tha you can't switch off.
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