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Homework Help: Quantum Well Electron Energy

  1. May 17, 2016 #1
    1. The problem statement, all variables and given/known data

    For a GaAs with bandgap Eg =1.4eV

    Effective electron mass is 0.07*me


    Calculate the energy of the ground (lowest) electron level in the conduction band with respect to the bottom of the conduction band.

    2. Relevant equations

    Ea =Ec + h^2a^2 / 8*me*d^2
    3. The attempt at a solution

    As it was with respect to the conduction band bottom I only used the second part of the equation and as it was the lowest level I had a=1

    My result

    Put it through Wolfram so you can see working


    However the answer I was given as a solution was

    4.36*10^-21 J ( 0.027eV)in the book

    where as my result is 8.6*10^-21

    Is there something wrong with my method?

    Last edited: May 17, 2016
  2. jcsd
  3. May 22, 2016 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
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