Iron doped zinc sulfide nanocrystals were obtained by colloidal synthesis using gelatin, lactose or polyvinyl alcohol as a stabilizing matrix. The structure of the nanocrystals was determined using X-ray diffraction (XRD). The influence of the concentration effect on the size and properties of ZnS nanocrystals, the optical absorption spectra and photoluminescence spectra were studied, and the types of optical transitions in these nanocrystals were determined.
Колоїдним методом отримані нано кристали ZnS: Cu. Легування домішкою Cu здійснювалося в процесі синтезу нанокристалів. Досліджено спектри оптичного поглинання і фотолюмінесценції. За величиною зміщення краю фундаментального поглинання визначено середні розміри нанокристалітів ~3 нм. Показано, що зелена люмінесценція нанокристалів ZnS:Cu ідентична люмінесценції об'ємних кристалів і обумовлена оптичними переходами на донорно-акцепторних парах.
Colloidal nanocrystals of ZnSe:Al were synthesized in organic polymer matrices. The optical absorption and longwavelength luminescence were studied, the average sizes of nanoparticles were determined, the efficiency of the transition from bulk crystals to nanocrystals was shown, and the types of optical transitions were determined.
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