Photoluminescence Definition and 11 Threads

Hello everyone, I deposit a thin film of HTM based carbazole and I measure the PL at lower tempertaure . by fiiting the experimental results with 5 peaks . I notice the dissapering of peak 1 at 300K and peak 3 at 200K. What is the nature of the interaction that can occur at lower temperature of...

I am trying to verify the results of the hybrid polariton case with the following hamiltonian, but cannot seem to verify the results in various published papers. Can someone please explain what is wrong and how to get the a similar dispersion graph? I'm solving for the eigenenergies for the...

hi, i did an experiment of photoluminescence in the lab and i was wondering about the spectrum of emission. why we get emission of photons with energies below the energy gap of the semiconductor? thanks

I'm not sure I understand what information we can get from Photoluminescence Excitation (PLE) that we don't get from regular PL. Let's imagine we have a sample with emissions between 700nm and 850nm. If I'm not mistaken in a typical PL experiment you'd just use a laser source with a wavelength...

Do I understand it correctly that photoluminescence at a semiconductor heterojunction occurs because of intralayer recombination? If so, why can't photoluminescence occur because of interlayer recombination? Is it because momentum cannot be conserved in such a process ( like in the indirect gap...

Currently we are working on gallium nitride material where I'm required to analyze the time resolved photoluminescence (PL) result. From literature review we found that many reported on lifetime decay value \tau so could anyone explain how to find this value. Does it come from the time resolved...

Greetings everyone, We have performed a photoluminescence experiment and plotted the resultant spectra for two samples of different concentration after correcting for the response of the CCD camera and got the results that is attached to this post. My question is that in the sample with...

I have measured photoluminescence (PL) and light absroption spectra of some transtion metal oxide nanostructures. The PL intensity increases remarkably by decreasing the size of nanostructures. However, the intensity of absorption vary litte. Is there any relationship between the PL intensity...

Hi guys (and girls;)) I need your help... I really don't get the difference between a PhotoLuminescence and Absorption experiment. What kind of informations one can get from each experiment? Moreover, why generally photoluminescence experiments are carried on at low temperatures? Thanks...

I'm writing a lab report about the photoluminescence of two chemicals, (1) indocyanine green and (2) hexamethylindotricarbocyanine tetrafluoroborate. I've done the experiment, and now I need to (well, I've been advised to) find some data in a published paper or reference book to compare my...

Can anyone tell me any good websites which have information on photoluminescence? Also, i have an lcd projector with a light source which has about 500 lumens as the light intensity.If i need to project an image of an chess board on the lcd onto the screen with the best contrast say for a 32...