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Results tagged with solar-cells
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user 277167
0
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1
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Why does solar cell performance use short-circuit current per unit area and open-circuit vol... [closed]
Here on this slide on page 54:
Only the short-circuit current ($J_{SC}$) is given with respect to area, whereas the voltage stands without relation to area. One could calculate it, because the area i …
0
votes
1
answer
539
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What is the relation between the short-circuit current and the band gap energy in solar cells?
For the VOC it is:
VOC = E_g - something,
where something is positive and depends on the Urbach energy. Otherwise it should be linear:
https://aip.scitation.org/doi/pdf/10.1063/1.49397
For the ISC I d …
2
votes
1
answer
69
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Why don’t illuminated series connected (photo-)diodes bias each other?
When you connect, let's say, three photodiodes or solar cells, with a load, and you measure the voltage across the middle photodiode. Will the voltage change if
the adjacent cells are in the dark
if …
1
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1
answer
71
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How many hot electrons are in solar cells that do not thermalize?
When an electron in a solar cell is excited beyond the conduction band edge, it will most likely thermalize which can only be counted as a heat loss. But in a few cases the electron will directly reco …
1
vote
1
answer
439
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Why are we even interested in solar cells under bias voltage?
I couldn't find any answer on this super basic question.
Some people on the internet say that you would not put a solar cell in an array under bias, others say that they bias themselves, but I don't u …
1
vote
1
answer
35
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Why can it be important to engineer band alignments/offsets (e.g. CdS buffer layer in CIGS)?
I would like to ask this question by the example of the CdS buffer layer in CIGS solar cells. One paper (https://pubs.rsc.org/en/content/articlelanding/2017/se/c7se00348j#!divAbstract) says that CdS i …
2
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1
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711
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Why is the diffusion length defined for minority charge carriers only?
As far as I could infer from the solar cell literature, when talk is about the "diffusion length", only the minority carriers are concerned.
Is there a diffusion length defined for majority carriers? …