Hello, intresting work. I have some questions. Why the FWHM is decreasing with the Al concentration? In the figure shows that the FWHM is increasing. I think that the crystallinity to be losing because the Raman spectrum shows that the 1LO is drecrecing. In the PL emission you have signal around to 350 nm, what is the origin of this emission?
The peak (around 350 - 420 nm) are due to emissions near the absorption edge that involves surface states or traps for electrons and also associated to Cd 2+ and/or S2- ion vacancies.
Comments
I have some questions.
Why the FWHM is decreasing with the Al concentration?
In the figure shows that the FWHM is increasing.
I think that the crystallinity to be losing because the Raman spectrum shows that the 1LO is drecrecing.
In the PL emission you have signal around to 350 nm, what is the origin of this emission?
Regarding the FWHM, are you referring to XRD? Well, due to the incorporation of Al, that implies loss of crystallinity and is corroborated by Raman.
Defect luminescence
The peak (around 350 - 420 nm) are due to emissions near the absorption edge that involves surface states or traps for electrons and also associated to Cd 2+ and/or S2- ion
vacancies.