Hello.
Is it possible to utilize the first derivative of the PL spectra to reveal the overlapping or hidden PL peak positions in the energy or wavelength spectrum? Would it be welcome to use such an approach in scientific publications?
Thanks
Ender
Yes. Deconvolution of PL spectra is a common practice. You can use first derivative and second derivative to identify the overlapping/hidden peaks. There are several programs (GRAMS AI, Origin) that can automatically analyze and fit component spectra. Fityk is a free alternative, where you can fit component spectra manually after you identified the peak positions from the derivative spectra. Here are some examples of our publications with spectral deconvolution:
Article Order, Disorder and Re-Order State of Lysozyme: Aggregation ...
Article Structural Insight of Amyloidogenic Intermediates of Human Insulin
Article Design and Synthesis of Fluorescent Carbon Dot Polymer and D...
Thanks for the answer and the explanation. Even if it is a mathematical proof for overlapping peaks in the PL spectra, some people question its physical meaning and they did not suggest me doing so.
Of course, proper justification would be required. Here are some scenarios where I would go or not go for deconvolution:
1) I expect two peaks but experimentally get one. I would try deconvolution.
2) I expect one peak and I get one peak. I would not try deconvolution.
3) I expect one peak but get a broad peak or a main peak with a hump or something that cannot pass as a single peak. I would go for deconvolution and then try to find the origin of the mysterious extra peak. Maybe do some more experiments.
For a completely new material, theoretical/computational studies may give you some idea about how many peaks to expect and in which energy range. Here is an example of computational UV absorption spectra of a core-shell nanomaterial in the following paper:
Article Effect of Mg Doping on Structural, Alloying, Electronic, Opt...
- Badges
- Science topic