Calculate Bandgap Voltage for GaAs Photodiode: 5V Reverse Bias

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SUMMARY

The discussion focuses on calculating the bandgap voltage for a Gallium Arsenide (GaAs) photodiode under a 5V reverse bias. The key point established is that the bandgap voltage is numerically equivalent to the bandgap energy when expressed in electron volts (eV). Participants emphasized the importance of converting bandgap energy to eV if it is not already in that unit, as this conversion is crucial for accurate calculations of carrier transmit time.

PREREQUISITES
  • Understanding of bandgap energy and its significance in semiconductor physics
  • Familiarity with Gallium Arsenide (GaAs) properties
  • Basic knowledge of photodiode operation and reverse bias effects
  • Ability to perform unit conversions, specifically to electron volts (eV)
NEXT STEPS
  • Research the bandgap energy of Gallium Arsenide (GaAs) and its implications for photodiode performance
  • Learn about the effects of reverse bias on carrier dynamics in photodiodes
  • Study the principles of semiconductor physics related to bandgap voltage calculations
  • Explore practical applications of GaAs photodiodes in optical systems
USEFUL FOR

Electrical engineers, semiconductor physicists, and anyone involved in the design or analysis of photodiodes, particularly those working with Gallium Arsenide materials.

Infidel22
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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!
 
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convert bandgap energy to electron volts (if strangely, it isn't already in eV). The bandgap voltatge is numerically the same as this number.
 

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