Hey /r/physics, So I'm working on some engineering multijunction PV work, and I know that tunnel junctions are essential to their success, but dammit, I can't figure out why they work theoretically. So here's your standard band diagram for a TJ in a tandem cell. Now the way I see it, when the electron or hole moves across the junction, it just ends up as the majority carrier on the other side which makes it moot as far as the operation of the cell goes, right? We only care about minority carriers, so how does that electron going through the tunnel junction into the valence band create a series connection between the single cells? It's driving me crazy!
Submitted December 29, 2015 at 02:55PM by superspartan999 http://ift.tt/22x4fU6
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