For example I have a glassy sample which is doped with Dy+3 ions. I am trying to find the best excitation wavelength for my photoluminescence (PL) measurements. For this purpose I perform a photoluminescence excitation (PLE) measurement. But I need a fixed wavelength to perform a PLE measurement. I am a little bit confused about choosing the right wavelength for PLE measurement. In the literature they fixed the emission wavelength to perform PLE measurements for Dy+3 doped samples as 575-576 nm. But according to what? A high energy wavelength is enough or does it need to be a specific wavelength? By the way the most intensive emission band of Dy+3 ion with a correct excitation is at 575 nm. But how can I guess this without making a proper PL measurement.
Take an absorption spectrum, from this you choose your excitation wavelength, take an emission spectrum, then you can choose your emission wavelength to perform an excitation spectrum
If you are able to make a PLE experiment, you can also do a PL experiment, right? So, first do this PL experiment to see what your sample "looks like"; from that experiment you not only get important information already, but you also obtain information necessary to be able to do a proper PLE experiment at all.
However, at the end you wrote "... without making a proper PL measurement" -- do you mean that this is a relevant constraint, or do you just try to avoid the PL step before the PLE experiment?
Thank you for your response. I kinda solved my problem just after asked this question here.
Ok I can perform a PL measurement in the beginning but how should I decide my excitation wavelength?
Then I decided to check it in the literature or just take my absorbtion edge value for the first PL experiment. And then go through PLE and the final PL.
and yes it was a relevant constraint.
Take an absorption spectrum, from this you choose your excitation wavelength, take an emission spectrum, then you can choose your emission wavelength to perform an excitation spectrum
Hi,
Perform the UV-vis analysis first and use the Lambda max value as an fixed excitation for PL.
Regards
To determine the best fixed the excitation wavelength λex should record the excitation spectrum of the luminescence of Dy3+ for λem= 575 nm. Then choose in the spectrum of the excitation λex at which the luminescence intensity maximum.
���;�T�;�y�}*���b�
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Physical Phenomena
- Luminescence
- Fluorescence