Temperature Dependence of Raman and Photoluminescence Spectra of Ternary Alloyed CdSe0.3Te0.7 Quantum Dots

Optical Characterization of CdSe1 – xTex Nanocrystals Grown in Borosilicate Glass

“…In the first two cases the LO phonon frequencies and the chemical composition are in good agreement with the dependence in Fig. 2a [16,17]. Meanwhile, in a recent paper [18] for Ni-doped CdSe0.5Te0.5 NCs, the authors observed a single mode near 180 cm -1 (intermediate between the CdTe and CdSe LO phonon frequencies) in the Raman spectrum, which supposes a one-mode behavior, thereby contradicting the whole array of the known Raman and infrared data for CdSe1 -xTex [4,6,16,17,19, 20 and references therein].…”

“…It should be noted that Raman scattering was also employed for the characterization of CdSe1 -xTex NCs produced by high-energy ball milling [16] and colloidal synthesis [17,18]. In the first two cases the LO phonon frequencies and the chemical composition are in good agreement with the dependence in Fig.…”

“…2a [16,17]. Meanwhile, in a recent paper [18] for Ni-doped CdSe0.5Te0.5 NCs, the authors observed a single mode near 180 cm -1 (intermediate between the CdTe and CdSe LO phonon frequencies) in the Raman spectrum, which supposes a one-mode behavior, thereby contradicting the whole array of the known Raman and infrared data for CdSe1 -xTex [4,6,16,17,19, 20 and references therein]. Such behavior can hardly be related to doping with small amounts of Ni and the issue of reasonable explanation of the data in Ref.…”