Nanocomposite films based on poly(N vinylcarbazole) and CdSe/CdS hybrid quantum dots

CdSe-based hybrid CdSe/ZnS quantum dots were synthesized. Their optical properties have been characterized using the absorption and luminescence spectroscopy methods. When ZnS shell was grown on the surface shell of CdSe nanoparticles, the photoluminescence stability and shelf life of the quantum dots increased significantly. The energy of the outer shell has increased. Absorption and luminescence spectra shifted to a shorter wavelength range. The size of the nucleus decreased from 3.7 nm to 2.8 nm. The surface was stabilized with oleic acid as an active ligand. After stabilization with the surfactant, the average total hydrodynamic size of the nanoparticles increased. The optical properties of composites of CdSe/ZnS and Cu:CdS/ZnS hybrid quantum dots (QDs) with optically active polymers poly(N-vinylcarbazole) and poly(9,9-di-n-octylfluorenyl-2,7-diyl). The components were mixed in a matrix of an optically transparent PMMA polymer, the mass fraction of which in the composite was 90%.

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