Chemical composition of matrix-embedded ternary II-VI nanocrystals derived from first- and second-order Raman spectra

被引：13
作者：
Azhniuk, Yu. M. [1 ]
Hutych, Yu. I. [1 ]
Lopushansky, V. V. [1 ]
Prymak, M. V. [1 ]
Gomonnai, A. V. [1 ]
Zahn, D. R. T. [2 ]
机构：
[1] Ukrainian Natl Acad Sci, Inst Electron Phys, 21 Univ Str, UA-88017 Uzhgorod, Ukraine
[2] Tech Univ Chemnitz, Semicond Phys, 70 Reichenhainer Str, D-09107 Chemnitz, Germany
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2016年 / 99卷
关键词：
Nanostructures; Semiconductors; Raman spectroscopy; Phonons; CDS1-XSEX NANOCRYSTALS; PHONON-DISPERSION; SIZE DEPENDENCE; OPTICAL PHONONS; SCATTERING; GLASS; NANOPARTICLES; CONFINEMENT; SURFACE; WURTZITE;
D O I：
10.1016/j.jpcs.2016.08.012
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A one- and multiphonon Raman scattering study is performed for an extensive set of CdS1-xSex, Cd1-yZnyS, Cd1-yZnySe, and CdSe1-xTex nanocrystals to investigate the applicability of first- and second-order Raman spectra for the determination of the matrix-embedded ternary nanocrystal composition. For one mode ternary systems both the LO and 2LO phonon frequencies in the Raman spectra are shown to be a good measure of the nanocrystal composition. For two-mode systems, the approaches based on the difference of the LO phonon frequencies (first-order Raman spectra) or double LO overtone and combination tone frequencies (second-order Raman spectra) as well as on the LO phonon band intensity ratios are analysed. The weak electron-phonon coupling in the II-VI nanocrystals and the polaron constant values for the nanocrystal sublattices are discussed. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：66 / 74
页数：9
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