Normally, transmission or absorption data as a function of wavelength is used to calculate optical band gap of semiconductor. Can we get the same from reflection data alone?
Determination of band gap from diffuse reflectance spectra is a standard technique; sample thickness is an important parameter.
go through papers of Dr. K. R. Nemade from SGB Amravati University, you will find the better ways of finding Band gap and possible explanation of results
YES, WE CAN CALCULATE THE OPTICAL BAND GAP BY transmission or absorption data as a function of wavelength USING TAUC METHOD.
I'd like to add that the real stop-band you measure in reflectance experiment at normal incidence doesn't conside with the band of absolute reflection but for the case of wispering insidence at 90 degrees. The real position of frequency gap is allways shifted to blue.
Dear sir,
By using UV-DRS we can find both direct and indirect band gap. Not only band gap optical constants like refractive index, absorption coefficient, extinction coefficient , optical conductivity also measured. I hope the following article helpful for you
http://przyrbwn.icm.edu.pl/APP/ABSTR/125/a125-5-30.html
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