on which parameter value of excitation wavelength depends for PL emission spectra of CdO nanoparticles
Please follow these points to find out the suitable excitation wavelength....
1. Record UV spectra of your sample by using any DRS instrument.
2. See the absorption edge.
3. Excite ur sample with that wavelength and record emission spectra.
4. If you don't have DRS instrument better you record first excitation spectra for ur sample by giving the emission wavelength of those color which you are expecting for your sample.
5. the range of excitation wavelength should be 200 nm to 20 nm less than your emission wavelength.
6. Now the last point, check the excitation spectra and find out the highest intense peak. The wavelength belongs to highest intense peak, is the suitable excitation wavelength for ur sample.
Good Luck.
In PL measurement typically the excitation wavelength ranges from 300nm -450 nm. The emission is at longer wavelengths, ex. the blue emission (430 nm) green emission (510 nm) or orange luminescence (620 nm). The excitation wavelength must match the absorption band of your material, otherwise there energy transfer will not be possible.
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