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Information × Registration Number 0212U001003, 0110U003755 , R & D reports Title Properties and processes which determine the luminescent efficiency of ultrasma cadmium chalcogenide nanocrystals obtained by colloidal synthesis: optical investigations popup.stage_title Head Valakh Mykhailo Yakovych, Доктор фізико-математичних наук Registration Date 05-01-2012 Organization Institute of Semiconductor Physics of National Academy of Sciences of Ukrain popup.description2 In this work experimental phonon spectra of ultrasmall, with diameter less than 2 nanometers, colloidal CdS NCs are obtained for the first time. Influence on the form of spectrums of conditions of NC synthesis and formation of a shell of another semiconductor is analysed. The temperature dependenceof the phonon spectrum have not found cardinal changes in the form of strips, their half-width or an an intensity ratio of the bands of different orders which serves as a measure of the strength of the electron-phonon interaction . The obtained data of non-stationary PL has found a spectral dependence of PL lifetime , namely - growth of lifetime with increase of the PL wavelength of registration which can display a dispersion of energy states which take part in radiative recombination. Study of dependence temperature of PL spectra of ultrasmall NC have not found cardinal changes in the form of band or their half-width that differs from behaviour known both for excitonic PL and for defect PL investigated earlier on other kinds of NCs. Product Description popup.authors Джаган Володимир Миколайович Юхимчук Володимир Олександрович popup.nrat_date 2020-04-02 Close