Question

Write the equation of current for the diode (i.e. solar cell) in the light. Compare it with diode current in dark ?

Answer 1

`Isc -I = Io [e^{(qv)/(nKt)} - 1]`

Step-by-step explanation:

the equation of current for the diode is

`I = Isc - Io [e^{(qv)/(nKt)} - 1]` ..........................1

here Isc is short circuit current

Io is the reverse saturation or the dark current

I is load current

q is charge

K is Boltzman constant i.e 1.381 ×
`10^(-23)` J/K

n is ideality factor

T is absolute temperature

and

here Isc - I is net current flow through diode and actual current when it is in light

so

`Isc -I = Io [e^{(qv)/(nKt)} - 1]`

here we know Io is dark saturated current it mean in the absence of light diode leak current density

and Io is important parameter to differentiate between diode