Aggregated inorganic chromophores in polymer matrices for photonics applications

Stabilization of PbS quantum dots by high molecular polyvinylpyrrolidone

“…), is observed in 1100–1300 nm spectral interval. It was supposed that the Förster transfer energy process inside small aggregates of polysized PbS nanoparticles plays a significant role in luminescent properties of PbS QD suspensions stabilized by high‐molecular PVP.…”

“…It is possible to note that these aggregates are disposed in the material uniformly and separated tone one from another by polymer. This SEM photo confirms the conclusion about the presence of such aggregates of PbS QD in the structure of PbS/high molecular PVP composites made in Kislyakov et al and Bagrov et al . on the base of luminescent experiments.…”

“…[10,11,[13][14][15][16][17][18][19][20][21] In addition, PVP molecules are able to participate in energy-transfer processes, expending luminescence excitation spectra in ultraviolet spectral range and considerably increasing luminescent intensity of ZnS nanocrystals doped by Mn 2+ or Cu + /Al 3+ .…”

“…The PbS QD is often prepared by wet chemical synthesis in the presence of organic‐stabilizing component . The chemical nature of stabilizing agent strongly affects the properties of QD suspensions prepared …”

“…Polyvinylpyrrolidone (PVP) is widely used for the stabilization of different QD . In addition, PVP molecules are able to participate in energy‐transfer processes, expending luminescence excitation spectra in ultraviolet spectral range and considerably increasing luminescent intensity of ZnS nanocrystals doped by Mn 2+ or Cu + /Al 3+ .…”