Solar Cell Problem(semiconductor)

[DragonChase29]

Homework Statement

Homework Equations

• Voc=kt/q x ln(tpXGlXNd/(ni)²)
• Isc=A x q x Lp x Gl
• Lp=√(Dp×tp)
• FF=Pma/(Isc*Voc)

The Attempt at a Solution

I got Voc=.298 V and Isc=3.04 mA
I]However, I am confused as to how to find the fill factor. I know it is the maximum voltage and current the load can take, but how do I determine this with the information given?
I thought it might have something to do with the diode current equation

• I=I0(e^qV/kT-1)

Any help is much appreciated!

 

[Tom.G]

Homework Statement

1) The variables above are given values but they are not defined as to what they are. Please do so.

FF=Pma/(Isc*Voc)

2) There is an undefined variable in 'FF=...'. When it is defined you may be able to assign it a value.

p.s. As I am not familiar with that form of FF definition, I don't know the answer; but when you "get all your ducks in a row" it may become obvious.

 

[DragonChase29]

1) The variables above are given values but they are not defined as to what they are. Please do so.2) There is an undefined variable in 'FF=...'. When it is defined you may be able to assign it a value.

p.s. As I am not familiar with that form of FF definition, I don't know the answer; but when you "get all your ducks in a row" it may become obvious.

First, thanks for the reply. This is a basic plug in chug problem to find V open circuit and I short circuit. I just sont understand how to find the fill factor with this information brcause you need to find the Pmax. How do i find Pmax is my concern.

 

[Tom.G]

Since I'm not familiar with that form of FF, you will have to clarify Pmax for me. The answer depends on the Pmax definition. (to answer a question, first define the question.)
Is it:

• the maximum power available to a load?
• the maximum power the photocell generates internally?
• something else?