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A Optical band gap of a cobalt ferrite

  1. May 6, 2016 #1
    Hi everyone
    How can I determine the optical band gap of a cobalt ferrite film deposited on a glass substrate using its absorption, transmittance and diffuse reflectance spectrum (knowing that I don't know the thickness of this film)
  2. jcsd
  3. May 6, 2016 #2
  4. May 6, 2016 #3
    thanks Vagn for replying me
    but i don't have the thickness of the film (so i can not determine the absorption coefficient alpha that i need for the tauc plot)
  5. May 6, 2016 #4
    You can plot αd instead of α.
  6. May 6, 2016 #5
    and how can i determine the band gap from that plot
  7. May 6, 2016 #6
    Replace the α's for the Tauc plot with αd's. As d is constant, it just changes the scale.
  8. May 6, 2016 #7
    i will do it
    thank you i really appreciate your help
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