Solar Cells Lecture 2: Physics of Crystalline Solar Cells
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- เผยแพร่เมื่อ 27 ต.ค. 2024
- Solar cell performance is determined by generation (of electron-hole pairs by the incident illumination) and recombination of electron-hole pairs. Efficiency is increased by increasing generation and decreasing recombination. This tutorial focussing on recombination losses in crystalline silicon solar cells under short-circuit and open-circuit conditions, but the general concepts apply more broadly than just to crystalline silicon.
on nanoHub: nanohub.org/res...
6:30 Charge is conserved. An electron-hole pair has zero net charge. When the hole and electron get swept out of the depletion region, the electron will give the N-region a -1 charge, and the hole gives the P-region a +1 charge. To "equalize" this charge imbalance, it requires only one electron to flow around the exterior circuit.
9:30 The electrons in the external circuit due to recombination are in the opposite direction from the light generated electrons flowing through the external circuit. That is why you subtract them to get the total diode current. I had to think about this for a while, so I thought a comment might be helpful to someone else.
The dark current under short circuit conditions is supposed to be 0. Whenever there is electron/ hole recombination an electron flows into the external circuit, leading to dark current flow. I don't understand how recombination of photo generated carriers under short circuit conditions does not lead to dark current, but recombination when electrons/ holes are injected to the p/ n side in a forward bias diode does.
GREAT work! Will use 4 my engineering thesis
Great lecture
Well explained
yep
I've got to finish these 4 hours of solar cell video and now i've got to check out a 4 hour editing tutorial video! Thanks a bunch! Lol :P
And you're an editor for LTT! Today day can't get anymore bizarre
I know more about diy from Avasva handbooks!