Hello,
This questions pertains to comparing peaks from spectra of 2 or more different samples in a fair way through normalizing
I know Origin normalizes based on the highest peak however if I have PL or EL spectra that has two peaks for many samples, what is the best way to compare?
One method I observed was dividing the spectral intensity across the wavelengths by area (after integration) of the peak. Would this be the best way?
Dear Noor,
the difference of PL and EL consists in the occupation of the excited energy level (here band of conductivity).This is important if you investigate an indirect semiconductor. By PL only a small momentum is transmitted by photons. Therefore, the momentum for occupation of the band of conductivity is generated by interaction with phonons. This process strongly depends on temperature. In contrast, the interaction with electrons allows immediately a high momentum transfer. I know this problem from the investigation of GaP.
Of course it depend on the question you want to discuss. I would select the intensity of the first phonon satellite hv = Eg - hw (hv emission energy, Eg gap energy and hw phonon energy). This emission line largely depends on the sample properties.
With Regard
R. Mitdank
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