Luminescence quantum yield of λ2 emission peak go on increasing with the increase of 'x' in Zn1-x Mn x S nanocrystals, whereas λ1 emission intensity go on decreasing with increasing concentration of Mn2+ ions.
Affirmative answers to these questions could imply that such NPs could act as local voltage sensors on the nanoscale (displaying changes in fluorescence quantum yield, fluorescence lifetime, and/or peak emission wavelength in response to the local electric field).
The cheap and stable urea-derived g-C3N4 in this study has a peak internal quantum yield of 28.4 % at 365 nm.
It was found that as the pendant alkyl length increased from the H to the hexyl, the electronic spectra of these oligomers were blue-shifted while the fluorescence quantum yield reduced and the oxidation peaks were positively shifted.
*Contained 35% propylene glycol, 35% polyethylene glycol-300, 18% 2-hydroxypropyl-β-cyclodextrin, 11.5% distilled water, and 0.5% DMSO; ε = molar extinction coefficient; Exc = excitation maximum wavelength; Em = emission peak wavelength; QY = quantum yield.
Because of the nonlinear nature of UC PL, the upconversion quantum yield (UCQY) or the efficiency of a UCPL peak is strongly dependent on the excitation density.
From the results, the photophysical parameters of perylene excimer such as the formation rate constant, the peak position and the lifetime and the quantum yield of fluorescence can be obtained.
The InP/ZnS core/shell QDs with maximum fluorescence peak at ~ 530 nm, superior fluorescence quantum yield of 60.1%, and full width at half maximum of 55 nm were applied as an emission layer to fabricate multilayered QD-LEDs.
The presence of a macromolecule in solutions under investigation favors the emission peak at 634 nm which presents a higher quantum yield [ 9].
The optimal ratio of 0.54 (weight ratio between PF5BODIPY565-4NH2 and PF46BT-4NH2) was determined for the blended Pdots, which exhibited an efficient yellow emission peak at 564 nm and a high fluorescence quantum yield of 0.32.
In chloroform, the emission peak appeared at about 420 nm with a high quantum yield of about 70%.
