The organization and dynamics of the hydrophobic fluorescent probe Nile Red incorporated in DOPC vesicles containing varying amounts of cholesterol has been monitored utilizing fluorescence-based approaches which include the red edge excitation shift (REES) approach and the parallax method for depth determination. Our results show that the fluorescence emission maximum, intensity, polarization,...

Nowadays, the excellent performance of metal halide perovskite quantum dots (PQDs) has been demonstrated, but stability is still a perplexing issue. In this paper, CsPbBr3 QDs were assembled into SBA-15 for first time. The thermal and photoluminescence (PL) intensity SBA-15@CsPbBr3 improved. PL spectra pure have red-shift (~6 nm) with increasing temperature. However, that almost no red-shift. d...

Excited-state relaxations in molecules are responsible for a red shift of the absorption peak with respect to the emission peak (Franck-Condon shift). The magnitude of this shift in semiconductor quantum dots is still unknown. Here we report first-principle calculations of excited-state relaxations in small (diameter ≤ 2.2 nm) Si nanocrystals, showing that the Franck-Condon shift is surprisingl...