Theoretical problem regarding Tandem Cells

Registered Users Posts: 1
Hey folks, first time posting here. My knowledge in tandem (multijunctional) solar cells is limited, so I thought I'd seek online help to answer this problem. I'd appreciate any help I can get here.

I tried understanding and doing this on my own by reading places like these http://pveducation.org/pvcdrom/solar-cell-operation/tandem-cells , but I failed miserably

Calculate the theoretical maximum efficiency of a tandem solar cell with a) 1-stack, b) 2-stack, c) 3-stack, and d) 5-stack structures with the following assumptions:-

1)Perfect “rectangular” band-pass absorber for each sub-cell;
2)100% quantum efficiency of charge generation by each sub-cell;
3)V_oc for each subcell = 80% of the energy of the least energetic photons absorbed by each subcell;
4)Fill Factor for each cell is 80%;
5)Use AM1.5 global spectrum from 350nm to 1400nm.
6)Perfect interconnects – no optical and electrical loss

Also, can someone please explain to me what "stack" here means? Is one stack a pair of subcells?

• Registered Users Posts: 1
Does the lack of visible response here mean that no one has been able to help clarify the answer to this question?
Most of us here are "end users" of solar/on grid/off grid power systems. A few here design hardware. Nobody here designs solar cells/panels (that I know off).

Both of you appears to be from University of Rochester (New York). Is this for a solar panel/physics class?

-Bill
Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
• Solar Expert Posts: 8,240 ✭✭✭✭✭
I stopped doing homework in the mid 70's
instruction #6 makes the entire lesson worthless, and the instructor should have their tongue wired to a 9v battery.
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