- #1
GraemeC
- 3
- 0
I am trying to get an estimation the junction capacitance of my GaAs Photodiode with respect to varying bias voltages.
My Semiconductor Physics online textbook gives the following equations
with
ε0 = permittivity of free space
εGgAs = GaAs dielectric constant
μ = Mobility of electrons
ρ = resitivity
Vbi = built-in voltage
VA = Bias voltage (in my case 0 - 5V)
A = photodiode area (in my case 0.3μm2)
Whenever, I work through the calculations I get answers that are many orders of magnitude off what I expect
I think the main issue is just getting the correct values(in the correct units) for each of the variables as I have been pulling them in from different sources.
Any help would appreciated.
My Semiconductor Physics online textbook gives the following equations
with
ε0 = permittivity of free space
εGgAs = GaAs dielectric constant
μ = Mobility of electrons
ρ = resitivity
Vbi = built-in voltage
VA = Bias voltage (in my case 0 - 5V)
A = photodiode area (in my case 0.3μm2)
Whenever, I work through the calculations I get answers that are many orders of magnitude off what I expect
I think the main issue is just getting the correct values(in the correct units) for each of the variables as I have been pulling them in from different sources.
Any help would appreciated.