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

页码：66 / 74

页数：9

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