Calculate Bandgap Voltage for GaAs Photodiode: 5V Reverse Bias

  • Thread starter Thread starter Infidel22
  • Start date Start date
  • Tags Tags
    Bandgap Voltage
AI Thread Summary
To calculate the bandgap voltage for a GaAs photodiode under a 5V reverse bias, it is essential to understand that the bandgap voltage is equivalent to the bandgap energy expressed in electron volts (eV). The discussion highlights confusion around the terminology, clarifying that if the bandgap energy is provided in eV, it directly translates to the bandgap voltage. Participants suggest converting the bandgap energy to eV if necessary. This conversion is crucial for determining the slowest possible transmit time for the carrier in the photodiode. Understanding this relationship simplifies the calculation process for the problem at hand.
Infidel22
Messages
5
Reaction score
0
Hello, I am having a bit of trouble with the following problem:

Assuming a built in voltage equal to the bandgap voltage, calculate the slowest possible transmit time for a carrier with 5V reverse bias applied to the GaAs photodiode.

I would be able to do this problem without difficulty if it wasnt for the part mentioning "Bandgap Voltage." I am familiar with bangap energy and how to calculate it, but I have no idea how to figure out the bandgap voltage for a given material. Can anyone give me any hints on this?

Thanks!
 
Engineering news on Phys.org
convert bandgap energy to electron volts (if strangely, it isn't already in eV). The bandgap voltatge is numerically the same as this number.
 
Thread 'Weird near-field phenomenon I get in my EM simulation'

Thread 'Weird near-field phenomenon I get in my EM simulation'

I recently made a basic simulation of wire antennas and I am not sure if the near field in my simulation is modeled correctly. One of the things that worry me is the fact that sometimes I see in my simulation "movements" in the near field that seems to be faster than the speed of wave propagation I defined (the speed of light in the simulation). Specifically I see "nodes" of low amplitude in the E field that are quickly "emitted" from the antenna and then slow down as they approach the far...
View full post »

Thread 'EMF (Electromagnetic Field) & EHS (Electromagnetic Hyper Sensitivity)'

Hello dear reader, a brief introduction: Some 4 years ago someone started developing health related issues, apparently due to exposure to RF & ELF related frequencies and/or fields (Magnetic). This is currently becoming known as EHS. (Electromagnetic hypersensitivity is a claimed sensitivity to electromagnetic fields, to which adverse symptoms are attributed.) She experiences a deep burning sensation throughout her entire body, leaving her in pain and exhausted after a pulse has occurred...
View full post »

Similar threads

PIN photodiode forward bias capacitance
Replies
12
Views
4K
Junction Capacitance in a GaAs Photodiode
Replies
4
Views
4K
Photodiode - Reverse Bias Operation
Replies
7
Views
3K
Understanding Photodiode Behavior in Reverse Bias Circuits
Replies
4
Views
2K
Quadrant photodiode selection advice
Replies
1
Views
2K
Voltage across reverse biased diode
Replies
16
Views
7K
How to Calculate the Output Voltage of a Photodiode?
Replies
7
Views
5K
Photodiode carrier transit time
Replies
2
Views
4K
The use of a reversed biased zener diode in voltage regulator
Replies
3
Views
7K
Calculating voltage class ab power amp
Replies
4
Views
5K

Hot Threads

Recent Insights

Back
Top