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Bandgap Voltage?

  1. Jun 1, 2005 #1
    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?

  2. jcsd
  3. Jun 1, 2005 #2


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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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