- #1
birdmani
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Hello, I am trying to determine the band gap of an amorphous material (a glass sample) and I read that you can do this from the determination of the optical absorption edge.
From this kind of measurements you fitt an equation of the type (αhν) = B (hv-Eo) 2.
my question are:
1 - is it possible to determine the optical band gap from transmittance or absorbance measure ? I am using a basic spetcrophotometer (which only measure transmittance or absorbance) without having any kind of accesory to measure reflectance?
2 - what kind of equation I need to use to interpret this experiments
thanks very much
From this kind of measurements you fitt an equation of the type (αhν) = B (hv-Eo) 2.
my question are:
1 - is it possible to determine the optical band gap from transmittance or absorbance measure ? I am using a basic spetcrophotometer (which only measure transmittance or absorbance) without having any kind of accesory to measure reflectance?
2 - what kind of equation I need to use to interpret this experiments
thanks very much