I am trying to get an estimation the junction capacitance of my GaAs Photodiode with respect to varying bias voltages.(adsbygoogle = window.adsbygoogle || []).push({});

My Semiconductor Physics online textbook gives the following equations

with

ε_{0}= permittivity of free space

ε_{GgAs}= GaAs dielectric constant

μ = Mobility of electrons

ρ = resitivity

V_{bi}= built-in voltage

V_{A}= Bias voltage (in my case 0 - 5V)

A = photodiode area (in my case 0.3μm^{2})

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.

**Physics Forums - The Fusion of Science and Community**

# Junction Capacitance in a GaAs Photodiode

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: Junction Capacitance in a GaAs Photodiode

Loading...

**Physics Forums - The Fusion of Science and Community**