Can we measure the band energy gap from Fluorescence spectra

[jhon]

Can we measure the band energy gap from Fluorescence spectra?
If yes, in what way? the excitation spectra or the emission spectra or both

Is there a good reference on this subject specifically

 

[Simon Bridge]

Yes.
You do it pretty much the same way as for the energy gaps in discrete spectra.
What level do you need the reference to be at?

eg.
http://www.nature.com/srep/2011/110908/srep00085/full/srep00085.html

 

[jhon]

thanks but in what way? the excitation spectra or the emission spectra or both
i'm using emission spectra and i calculate the Eg from wavelength of maximum intensity
does my way correct

and i found the Eg from urbach edge is begger than the Eg from Fluorescence(emission spectra) and i conclude that there is defect in my samples
does my way correct?

i need reference for beginner or intermediate

 

[jhon]

any one can help ?

 

[Simon Bridge]

You appear to have conducted an actual experiment which has provided results you did not expect.
I don't think anyone can help with that without knowing the details of the experiment itself. Write up what you have so far, formally, and maybe someone will read it over.

I gave you an example where this was done -- did you read it?