I was conducting PL analysis on the WSe2 monolayer and I see that the peak appears at 725nm in Fluoromax plus but when I use the Renishaw Invia Raman I see it at around 770nm.
Please help.
What are the excitation wavelengths? I don't know the Fluoromax, if your Renishaw is the same as ours it would be 532 nm.
Excitation at different wavelengths leads to different emissions, that's completely normal, e.g. for carbon nanotubes, plotting emission vs. excitation is the common identification scheme (search for Kataura plot).
Jürgen Weippert I tried it with 532 nm at fluoromax to match it with the excitation wavelength in Renishaw, although I was getting lots of noise but even then I did not see a peak at 770nm. I found a peak at 725 nm.
Here are the spectra. They’re both from the same material but I see the peaks in different wavelength. Jürgen Weippert
I think I figured out the issue. The peaks in fluorimeter are probably artifacts. While Raman started showing shifts in peak position after treatment, the fluorimeter peak didn’t show any change in position.
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